10-Q/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

(Mark One)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2012.
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition  period from           to

Commission File Number: 001-33440

INTERACTIVE BROKERS GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware	30-0390693
(State or other jurisdiction	(I.R.S. Employer
of incorporation or organization)	Identification No.)

One Pickwick Plaza

Greenwich, Connecticut 06830

(Address of principal executive office)

(203) 618-5800

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x No  o.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No   ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer” and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer x	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
		(Do not check if a smaller
		reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes  o    No  x.

As of May 8, 2012, there were 45,579,884 shares of the issuer’s Class A common stock, par value $0.01 per share, outstanding and 100 shares of the issuer’s Class B common stock, par value $0.01 per share, outstanding.

INTERACTIVE BROKERS GROUP, INC.

AMENDED QUARTERLY REPORT ON FORM 10-Q/A FOR THE QUARTER ENDED MARCH 31, 2012

Table of Contents

		Page
		No.
	Explanatory Note	3
PART I:	FINANCIAL INFORMATION
Item 1:	Financial Statements (Unaudited, As Restated)	5
	Condensed Consolidated Statements of Financial Condition	6
	Condensed Consolidated Statements of Comprehensive Income	7
	Condensed Consolidated Statements of Cash Flows	8
	Condensed Consolidated Statements of Changes in Equity	9
	Notes to Condensed Consolidated Financial Statements	10
Item 2:	Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 3:	Quantitative and Qualitative Disclosures About Market Risk	51
Item 4:	Controls and Procedures	54
PART II:	OTHER INFORMATION
Item 1:	Legal Proceedings	57
Item 1A:	Risk Factors	57
Item 2:	Unregistered Sales of Equity Securities and Use of Proceeds	57
Item 3:	Defaults upon Senior Securities	57
Item 5:	Other Information	57
Item 6:	Exhibits	58
SIGNATURES		59

2

Explanatory Note

In May 2012, in connection with the review of the Company’s Quarterly Report of Form 10-Q for the quarter ended March 31, 2012 (the “Original Filing”), Deloitte & Touche LLP, the Company’s independent registered public accounting firm questioned the Company’s interpretation and application of accounting guidance contained in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC or the “Codification”) 480-10-S99, Distinguishing Liabilities from Equity, SEC Materials, formerly FASB Emerging Issues Task Force Topic D-98, to cash redemption provisions regarding redeemable noncontrolling interests.  After reassessing its interpretation and application of this accounting guidance, including obtaining an interpretation from the Office of the Chief Accountant of the Securities and Exchange Commission (“SEC”), the Company concluded that its interpretation of this accounting guidance and its application of that guidance to these cash redemption provisions was incorrect, resulting in an error in its consolidated financial statements.  This error had no effect on reported net income attributable to common stockholders or cash flows, but did affect the classification of redeemable noncontrolling interests in IBG LLC (“LLC”) attributable to IBG Holdings LLC (“Holdings”) during the period from the Company’s May 3, 2007 initial public offering through June 6, 2012, as more fully described in Note 21 to the consolidated financial statements contained in Part 2, Item 8 of the Company’s Amended Annual Report on Form 10-K/A filed with the SEC on August 31, 2012.  As a result of this change in the classification of redeemable noncontrolling interests, the calculation of earnings per share was also affected.  On August 13, 2012, the Audit Committee of the Board of Directors of the Company and management concluded that the previously issued consolidated financial statements for the three years ended December 31, 2011 and for the quarter ended March 31, 2012 should no longer be relied upon and should be restated.

Also on August 15, 2012, the Company filed a Current Report on Form 8-K with the SEC in which it announced that the previously issued audited consolidated financial statements, report on internal controls, and the Reports of Independent Registered Public Accounting Firm thereon for the three years ended December 31, 2011 in the Company’s originally filed Annual Report for the year ended December 31, 2011 on Form 10-K, as well as the unaudited condensed consolidated financial statements for the quarters ended March 31, 2012 and 2011 in the Company’s originally filed  Quarterly Report on Form 10-Q, should no longer be relied upon.

The Company is filing this Amended Quarterly Report on Form 10-Q/A (the “Amended Filing” or “Form 10-Q/A”) for the quarter ended March 31, 2012, to restate the Company's unaudited condensed consolidated financial statements and related disclosures for the quarters ended March 31, 2012 and 2011 originally included in the Company’s Original Filing which was filed with the SEC on May 15, 2012.

Internal Control Considerations

In conjunction with the restatement, management identified control deficiencies in its internal controls over financial reporting associated with the review and interpretation of complex accounting issues - specifically, redeemable noncontrolling interests in LLC attributable to Holdings and stock based compensation - that constitute a material weakness, as discussed in Part I, Item 4, “Controls and Procedures”, of this Amended Quarterly Report on Form 10-Q/A. A material weakness is a control deficiency, or combination of control deficiencies, that results in more than a remote likelihood that a material misstatement of the annual or interim consolidated financial statements will not be prevented or detected. For a discussion of management’s consideration of our disclosure controls and procedures, the material weakness identified and the remediation plan design efforts being made, see Part II, Item IA, “Risk Factors”, and Part I, Item 4 included in this Amended Filing.

Adjustments

In addition to the reclassifications relating to the reporting of redeemable noncontrolling interests attributable to Holdings described above, which was corrected in the Company’s 2011 Amended Annual Report on Form 10-K/A and this Amended Filing, in connection with the original filings of the Company’s 2011 Annual Report on Form 10-K and Quarterly Report on Form 10-Q for the quarter ended March 31, 2012 the Company had corrected other errors that had been previously identified that affected previously issued financial statements.  These items included errors in recording share issuances under stock compensation award plans which was corrected in connection with the preparation of the Company’s original filing of its Quarterly Report on Form 10-Q for the quarter ended March 31, 2012 and adjustments to record the timely recognition of the effect of equity award plan forfeiture provisions, which error was corrected in the original filing of the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.  Both of these corrections were disclosed as immaterial restatements in the respective original filings.

3

Additional information on the effect of these adjustments to our unaudited condensed consolidated financial statements is contained in Item 1, Note 17 - Restatement.

For convenience of the reader, this Amended Filing sets forth the Original Filing in its entirety. The sections of the Original Filing which were not amended are unchanged and continue in full force and effect as originally filed. This Amended Filing has not been updated to reflect events occurring subsequent to the Original Filing date other than those associated with the correction of the error and other adjustments specifically noted. The Items in this Form 10-Q/A which are amended and restated as a result of the foregoing are:

• Part I, Item 1. - Financial Statements and Supplementary Data

• Part I, Item 2. - Management’s Discussion and Analysis of Financial Condition and Results of Operations

• Part I, Item 4. - Controls and Procedures

• Part II, Item IA. - Risk Factors

• Part II, Item 6 - Exhibits

                 In accordance with applicable SEC rules, this Amended Filing includes certifications from our Chief Executive Officer and Chief Financial Officer dated as of the date of this Amended Filing.

4

PART I.  FINANCIAL INFORMATION

Financial Statements Introductory Note

The Company is a holding company whose primary asset is its ownership of approximately 11.5% of the membership interests of LLC. See Notes 1 and 4 to the unaudited condensed consolidated financial statements for further discussion of the Company’s capital and ownership structure.

We are an automated global electronic broker and market maker specializing in routing orders and executing and processing trades in securities, futures, foreign exchange instruments, bonds and mutual funds on more than 100 electronic exchanges and trading venues around the world. In the U.S., our business is conducted from our headquarters in Greenwich, Connecticut and from Chicago, Illinois and Jersey City, New Jersey. Abroad, we conduct business through offices located in Canada, England, Switzerland, Hong Kong, India, Australia, Japan and Brazil. At March 31, 2012 we had 885 employees worldwide.

As discussed in Note 17, the unaudited condensed consolidated financial statements for the three months ended March 31, 2011 included herein have been restated for an error.

5

	Interactive Brokers Group, Inc. and Subsidiaries
	Condensed Consolidated Statements of Financial Condition
	(Unaudited)
					(As Restated, Note 17)
					March 31,			December 31,
(in thousands, except share data)					2012			2011
	Assets
	Cash and cash equivalents			$	1,551,399		$	1,695,495
	Cash and securities - segregated for regulatory purposes				11,028,544			10,069,938
	Securities borrowed				3,083,729			2,661,671
	Securities purchased under agreements to resell				365,229			375,366
	Trading assets, at fair value:
		Financial instruments owned			4,412,405			5,069,271
		Financial instruments owned and pledged as collateral			2,031,217			1,545,807
					6,443,622			6,615,078
	Other receivables:
		Customers, less allowance for doubtful accounts of $3,261 and
			$3,332 at March 31, 2012 and December 31, 2011		8,457,962			7,024,792
		Brokers, dealers and clearing organizations			1,192,317			1,397,772
		Receivable from affiliate			593			595
		Interest			22,661			20,540
					9,673,533			8,443,699
	Other assets				550,342			543,118
	Total assets			$	32,696,398		$	30,404,365
	Liabilities and equity
	Liabilities:
	Trading liabilities - financial instruments sold but not yet purchased,
		at fair value		$	5,674,460		$	6,156,148
	Securities loaned				1,768,117			1,386,059
	Short-term borrowings				14,474			6,538
	Other payables:
		Customers			19,501,916			17,300,105
		Brokers, dealers and clearing organizations			334,133			247,360
		Payable to affiliate			271,602			271,602
		Accounts payable, accrued expenses and other liabilities			129,289			116,771
		Interest			6,974			6,416
					20,243,914			17,942,254
	Senior notes payable				30,238			101,411
	Senior secured credit facility				-			-
					27,731,203			25,592,410
	Redeemable noncontrolling interests				5,996,220			5,269,619
	Commitments, contingencies and guarantees
	Equity (Deficit):
	Stockholders’ equity (deficit):
		Common stock, $0.01 par value per share:
		Class A – Authorized - 1,000,000,000, Issued - 46,063,918 and
			46,061,256,  Outstanding – 45,579,884 and 45,576,791 shares
			at March 31, 2012 and December 31, 2011		460			460
		Class B – Authorized, Issued and Outstanding – 100 shares
			at March 31, 2012 and December 31, 2011		-			-
		Additional paid-in capital			-			-
		Accumulated deficit			(1,041,240	)		(465,138	)
		Accumulated other comprehensive income, net of income taxes of
			$11,938 and $10,454 at March 31, 2012 and December 31, 2011		21,113			18,487
		Treasury stock, at cost, 484,034 and 484,465 shares
			at March 31, 2012 and December 31, 2011		(13,278	)		(13,310	)
	Total stockholders’ deficit				(1,032,945	)		(459,501	)
	Other noncontrolling interests				1,920			1,837
	Total deficit				(1,031,025	)		(457,664	)
	Total liabilities and deficit			$	32,696,398		$	30,404,365
See accompanying notes to the unaudited condensed consolidated financial statements.

6

	Interactive Brokers Group, Inc. and Subsidiaries
	Condensed Consolidated Statements of Comprehensive Income
	(Unaudited)
			(As Restated, Note 17)
				Three months ended
			March 31,
(in thousands, except for shares or per share amounts)				2012		2011
Revenues:
	Trading gains		$	137,280	$	200,338
	Commissions and execution fees			100,885		109,199
	Interest income			66,576		58,663
	Other income			18,324		17,435
		Total revenues		323,065		385,635
	Interest expense			19,143		17,747
		Total net revenues		303,922		367,888
Non-interest expenses:
	Execution and clearing			64,624		66,237
	Employee compensation and benefits			62,725		52,359
	Occupancy, depreciation and amortization			9,934		9,246
	Communications			5,674		5,448
	General and administrative			11,288		12,626
		Total non-interest expenses		154,245		145,916
Income before income taxes				149,677		221,972
Income tax expense				8,734		18,732
Net income				140,943		203,240
	Less net income attributable to noncontrolling interests			129,859		186,989
Net income attributable to common stockholders			$	11,084	$	16,251
Earnings per share:
	Basic		$	0.27	$	0.39
	Diluted		$	0.27	$	0.39
Weighted average common shares outstanding:
	Basic			45,576,925		42,231,651
	Diluted			45,951,464		42,791,822
Comprehensive income:
	Net income attributable to common stockholders		$	11,084	$	16,251
	Other comprehensive income:
		Cumulative translation adjustment, before income taxes		4,110		2,005
		Income taxes related to items of other comprehensive income		1,484		737
	Other comprehensive income (loss), net of tax			2,626		1,268
Comprehensive income attributable to common stockholders			$	13,710	$	17,519
Comprehensive income attributable to noncontrolling interests:
	Net income attributable to noncontrolling interests		$	129,859	$	186,989
	Other comprehensive income (loss) - cumulative translation adjustment			31,551		16,618
Comprehensive income attributable to noncontrolling interests			$	161,410	$	203,607
See accompanying notes to the unaudited condensed consolidated financial statements.

7

					Interactive Brokers Group, Inc. and Subsidiaries
					Condensed Consolidated Statements of Cash Flows
					(Unaudited)
							(As Restated, Note 17)
							Three months ended March 31,
(in thousands)							2012			2011
	Cash flows from operating activities:
		Net income				$	140,943		$	203,240
		Adjustments to reconcile net income to net cash used in
		operating activities:
			Translation gains				(11,111	)		(15,655	)
			Deferred income taxes				1,791			9,514
			Depreciation and amortization				5,193			4,946
			Employee stock plan compensation				20,579			10,467
			Losses (gains) on non-market making investments, net				1,009			(3,261	)
			Bad debt expense and other				17			264
		Change in operating assets and liabilities:
			Increase in cash and securities - segregated for regulatory purposes				(958,810	)		(368,542	)
			Increase in securities borrowed				(419,838	)		(30,921	)
			Decrease in securities purchased under agreements to resell				10,125			11,291
			Decrease in trading assets				184,646			1,019,213
			Increase in receivables from customers				(1,436,050	)		(2,313,260	)
			Decrease (increase) in other receivables				207,718			(5,864	)
			Decrease (increase) in other assets				(2,806	)		7,646
			Decrease in trading liabilities				(471,665	)		(782,276	)
			Increase (decrease) in securities loaned				383,369			(139,948	)
			Increase in payable to customers				2,195,191			2,346,102
			Increase in other payables				95,769			10,307
				Net cash used in operating activities			(53,930	)		(36,737	)
	Cash flows from investing activities:
			Purchases of non-market making investments				(64,705	)		(39,737	)
			Sales of non-market making investments				57,828			7,916
			Distribution received from equity investment				1,567			-
			Purchase of property and equipment				(5,176	)		(3,167	)
				Net cash used in investing activities			(10,486	)		(34,988	)
	Cash flows from financing activities:
			Dividends paid to shareholders				(4,557	)		-
			Dividends paid to noncontrolling interests				(34,993	)		-
			Redemption of former member interest				-			(816	)
			Issuance of senior notes				-			143,704
			Redemptions of senior notes				(71,173	)		(137,418	)
			Repayments of senior secured credit facility				-			(100,000	)
			Increase (decrease) in short-term borrowings, net				7,615			(18,777	)
				Net cash used in financing activities			(103,108	)		(113,307	)
	Effect of exchange rate changes on cash and cash equivalents						23,428			6,973
	Net decrease in cash and cash equivalents						(144,096	)		(178,059	)
	Cash and cash equivalents at beginning of period						1,695,495			1,354,219
	Cash and cash equivalents at end of period					$	1,551,399		$	1,176,160
Supplemental disclosures of cash flow information:
	Cash paid for interest					$	18,585		$	18,029
	Cash paid for taxes					$	6,239		$	32,772
Non-cash financing activities:
	Adjustments to additional paid in capital for changes in proportionate ownership in IBG LLC					$	(38	)	$	-
	Adjustments to additional noncontrolling interests for changes in proportionate ownership in IBG LLC					$	38		$	-
	Changes in redemption value of redeemable noncontrolling interests					$	726,601		$	(648,581	)
	Changes to total equity (deficit) for the change in redemption value of redeemable noncontrolling interests					$	(726,601	)	$	684,581
See accompanying notes to the unaudited condensed consolidated financial statements.

8

Interactive Brokers Group, Inc. and Subsidiaries
Condensed Consolidated Statements of Changes in Equity (Deficit)
Three months ended March 31, 2012 and 2011
(As Restated, Note 17)
(Unaudited)
	Common Stock
										Retained			Accumulated			Total
					Additional					Earnings/			Other			Stockholders'			Other Non-			Total			Redeemable
	Issued		Par		Paid-In			Treasury		(Accumulated			Comprehensive			Equity			controlling			Equity			Noncontrolling
(in thousands, except for share amounts)	Shares		Value		Capital			Stock		Deficit)			Income			(Deficit)			Interests			(Deficit)			Interests
Balance, January 1, 2012	46,061,256	$	460	$	-		$	(13,310	)	$	(465,138	)	$	18,487	$	(459,501	)	$	1,837		$	(457,664	)	$	5,269,619
Adjustment of redeemable noncontrolling interests to redemption value					(2,030	)					(582,629	)				(584,659	)					(584,659	)		726,601
Common Stock distributed to employees	2,662		-		41			32								73						73
Compensation for stock grants vesting in the future					2,027											2,027			-			2,027
Dividends paid to shareholders											(4,557	)				(4,557	)					(4,557	)
Dividends paid by IBG LLC to other noncontrolling interests																-			(4	)		(4	)
Adjustments for changes in proportionate ownership in IBG LLC					(38	)										(38	)		-			(38	)
Comprehensive income, net of tax											11,084			2,626		13,710			87			13,797
Balance, March 31, 2012	46,063,918	$	460	$	-		$	(13,278	)	$	(1,041,240	)	$	21,113	$	(1,032,945	)	$	1,920		$	(1,031,025	)	$	5,996,220

	Common Stock
											Retained			Accumulated		Total
					Additional						Earnings/			Other		Stockholders'			Other Non-				Redeemable
	Issued	Par			Paid-In		Treasury				(Accumulated			Comprehensive		Equity			controlling	Total Equity			Noncontrolling
(in thousands, except for share amounts)	Shares	Value			Capital		Stock				Deficit)			Income		(Deficit)			Interests	(Deficit)			Interests
Balance, January 1, 2011	42,903,718	$	429	$	-		$	(19,132	)	$	(2,031,656	)	$	21,137	$	(2,029,222	)	$	1,458	$	(2,027,764	)	$	6,320,849
Adjustment of redeemable noncontrolling interests
to redemption value					88						814,670					814,758					814,758			(684,581	)
Redemption of former member interest					(88	)										(88	)				(88	)
Comprehensive income, net of tax											16,251			1,268		17,519			104		17,623
Balance, March 31, 2011	42,903,718	$	429	$	-		$	(19,132	)	$	(1,200,735	)	$	22,405	$	(1,197,033	)	$	1,562	$	(1,195,471	)	$	5,636,268
See accompanying notes to the unaudited condensed consolidated financial statements.

9

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

1. Organization and Nature of Business

Interactive Brokers Group, Inc. (“IBG, Inc.” or the “Company”) is a Delaware holding company whose primary asset is its ownership of approximately 11.5% of the membership interests of IBG LLC, which, in turn, owns operating subsidiaries (collectively, “IBG LLC” or the “Group”).  The accompanying unaudited condensed consolidated financial statements of IBG, Inc. reflect the consolidation of IBG, Inc.’s investment in IBG LLC for all periods presented (Note 4).  IBG LLC is an automated global electronic broker and market maker specializing in routing orders and processing trades in securities, futures and foreign exchange instruments.

IBG LLC is a Connecticut limited liability company that conducts its business through its operating subsidiaries (collectively called the “Operating Companies”): Timber Hill LLC (“TH LLC”), Timber Hill Europe AG (“THE”), Timber Hill Securities Hong Kong Limited (“THSHK”), Timber Hill Australia Pty Limited (“THA”), Timber Hill Canada Company (“THC”), Interactive Brokers LLC (“IB LLC”) and subsidiary, Interactive Brokers Canada Inc. (“IBC”), Interactive Brokers (U.K.) Limited (“IBUK”), Interactive Brokers (India) Private Limited (“IBI”), Interactive Brokers Financial Products S.A. (“IBFP”), Interactive Brokers Hungary KFT (“IBH”), IB Exchange Corp. (“IBEC”), Interactive Brokers Securities Japan, Inc. (“IBSJ”), IB Brasil Participações Ltda (“IBBH”), Interactive Brokers Software Services Estonia OU (“IBEST”) and Interactive Brokers Software Services Russia (“IBRUS”).

IBG, Inc. operates in two business segments, electronic brokerage and market making.  IBG, Inc. conducts its electronic brokerage business through its Interactive Brokers subsidiaries, which provide electronic execution and clearing services to customers worldwide.  The Company conducts its market making business principally through its Timber Hill subsidiaries on the world’s leading exchanges and market centers, primarily in exchange-traded equities, equity options and equity-index options and futures.

Certain of the Operating Companies are members of various securities and commodities exchanges in North America, Europe and the Asia/Pacific region and are subject to regulatory capital and other requirements (Note 14).  IB LLC, IBUK, IBC, IBI and IBSJ carry securities accounts for customers or perform custodial functions relating to customer securities.

2. Significant Accounting Policies

Basis of Presentation

These unaudited condensed consolidated financial statements are presented in U.S. dollars and have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding financial reporting with respect to Form 10-Q/A and accounting standards generally accepted in the United States of America (“U.S. GAAP”) promulgated in the FASB Accounting Standards Codification (“ASC” or the “Codification”).  These unaudited condensed consolidated financial statements include the accounts of the Company and its subsidiaries and include all adjustments of a normal, recurring nature necessary to present fairly the financial condition as of March 31, 2012 and December 31, 2011, the results of operations and comprehensive income for the three months ended March 31, 2012 and 2011 and cash flows for the three months ended March 31, 2012 and 2011. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in IBG, Inc.’s Annual Report on Form 10-K/A filed with the SEC on August 31, 2012. The condensed consolidated financial statement information as of December 31, 2011 has been derived from the 2011 audited consolidated financial statements. The results of operations for interim periods are not necessarily indicative of results for the entire year.

Gains and losses from foreign currency transactions are included in trading gains and losses where related to market making activities or in interest income where related to the investment of customer funds as part of electronic brokerage activities in the unaudited condensed consolidated statements of comprehensive income.  Non-U.S. subsidiaries have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated to U.S. dollars at period-end exchange rates, while revenues and expenses are translated at average exchange rates during the year.  Adjustments that result from translating amounts from a subsidiary’s functional currency to the U.S. dollar are reported as a component of other comprehensive income.

10

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Principles of Consolidation, including Noncontrolling Interests

The unaudited condensed consolidated financial statements include the accounts of IBG, Inc. and its majority and wholly owned subsidiaries.  As sole managing member of IBG LLC, IBG, Inc. exerts control over the Group’s operations.  In accordance with ASC 810, Consolidation, the Company consolidates the Group’s unaudited condensed consolidated financial statements and records as noncontrolling interest the interests in the Group that IBG, Inc. does not own.

Prior to the June 6, 2012 amendment to the Exchange Agreement (Note 4), the Company was required to report IBG Holdings LLC’s ownership as redeemable noncontrolling interests (i.e., temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (formerly FASB Emerging Issues Task Force Topic D-98), outside of total equity (Note 17) in the unaudited condensed consolidated financial statements.  Redemption value of these redeemable noncontrolling interests is measured as the number of equivalent shares of member interests in IBG LLC owned by IBG Holdings LLC multiplied by the then current market price per share of the Company’s common stock.  The excess of the redemption value over the book value of these interests, which does not affect net income attributable to common stockholders or cash flows, is required to be accounted for as a reduction of the Company’s stockholders’ equity in the consolidated statement of financial condition.

The Company has elected to recognize changes in redemption value in each reporting period immediately as they occur as if the end of each reporting period was also the redemption date for the entire redeemable noncontrolling interest under paragraph 15(b) of ASC 480-10-S99-3A, notwithstanding that the redeemable noncontrolling interests are redeemable over a period of time pursuant to a redemption schedule (Note 4).

The Company’s policy is to consolidate all entities of which it owns more than 50% unless it does not have control.  All inter-company balances and transactions have been eliminated.  IBG, Inc. would also consolidate any Variable Interest Entities (“VIEs”) pursuant to ASC 860, Transfers and Servicing and ASC 810 of which it is the primary beneficiary.  IBG, Inc. currently is not the primary beneficiary of any such entities and therefore no VIEs are included in the unaudited condensed consolidated financial statements.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in the unaudited condensed consolidated financial statements and accompanying notes.  Estimates, by their nature, are based on judgment and available information.  Therefore, actual results could differ materially from those estimates.  Such estimates include the estimated fair values of IBG LLC and the Company in connection with accounting for redeemable noncontrolling interests, value of investments accounted for under the equity method of accounting, the estimated useful lives of property and equipment, including capitalized internally developed software, the allowance for doubtful accounts, compensation accruals, tax liabilities and estimated contingency reserves.

Fair Value

At March 31, 2012 and December 31, 2011, substantially all of IBG, Inc.’s assets and liabilities, including financial instruments, were carried at fair value based on published market prices and are marked to market daily, or were assets which are short-term in nature (such as U.S. government treasury bills or spot foreign exchange) and were carried at amounts that approximate fair value.

IBG, Inc. applies the fair value hierarchy of ASC 820, Fair Value Measurement, to prioritize the inputs to valuation techniques used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities and the lowest priority to unobservable inputs.  The three levels of the fair value hierarchy are:

Level 1	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level 2	Quoted prices in markets that are not considered to be active or financial instruments for which all significant inputs are observable, either directly or indirectly; and
Level 3	Prices or valuations that require inputs that are both significant to fair value measurement and unobservable

Financial instruments owned and financial instruments sold, but not yet purchased, except forward currency contracts, over-the-counter (“OTC”) currency options and certain corporate and municipal debt securities, which are classified as Level 2 financial instruments, are classified within Level 1 of the fair value hierarchy.  The Company’s financial instruments are valued using quoted market prices as published by exchanges and clearing houses or otherwise broadly distributed in active markets, include U.S. government and sovereign obligations, active listed securities, options, futures, options on futures and corporate and municipal debt

11

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

securities.  IBG, Inc. does not adjust quoted prices for Level 1 financial instruments, even in the event that the Company may hold a large position whereby a purchase or sale could reasonably impact quoted prices.

Currency forward contracts and OTC currency options are valued using broadly distributed bank and broker prices, and are classified as Level 2 financial instruments as such instruments are not exchange-traded.  Corporate and municipal debt securities, including Federal Deposit Insurance Corporation insured corporate bonds held as securities segregated for regulatory purposes, that are not actively traded are also classified in Level 2.

Investments in listed common stock and investments in other fair value non-market making securities, which investments are reported in other assets in the accompanying unaudited condensed consolidated statement of financial condition, are generally reported as Level 2 financial instruments, except for unrestricted listed equities, which are Level 1 financial instruments.  Investments in other non-market making securities include corporate, municipal and asset-backed debt securities, which are Level 2 financial instruments whose fair values are determined using broker and vendor prices.

Earnings Per Share

Earnings per share (“EPS”) are computed in accordance with ASC 260, Earnings per Share.  Shares of Class A and Class B common stock share proportionately in the earnings of IBG, Inc. Basic earnings per share are calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period.  Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for dilutive potential common shares.

                The Company has determined to reflect Topic D-98 measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common shareholders.  Furthermore, in accordance with footnote 17 of ASC 480-10-S99-3A, the Company has elected to treat only the portion of the periodic measurement adjustments that reflect a redemption in excess of fair value as being akin to a dividend, reducing net income available for common stockholders for purposes of applying the two-class method.  Decreases in the carrying amount of redeemable noncontrolling interests through Topic D-98 measurement adjustments are reflected in the application of the two-class method only to the extent they represent recoveries of amounts previously accounted for by applying the two-class method.

Stock-Based Compensation

IBG, Inc. follows ASC 718, Compensation—Stock Compensation, to account for its stock-based compensation plans. ASC 718 requires all share-based payments to employees to be recognized in the financial statements using a fair value-based method. As a result, IBG, Inc. expenses the fair value of stock granted to employees, generally 50% in the year of grant in recognition of plan forfeiture provisions (described below) and the remaining 50% over the related vesting period utilizing the “graded vesting” method permitted under ASC 718-10.  In the case of “retirement eligible” employees (those employees older than 59), 100% of share awards are expensed when granted.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company. The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.

Cash and Cash Equivalents

IBG, Inc. defines cash equivalents as short-term, highly liquid securities and cash deposits with original maturities of three months or less, other than those used for trading purposes.

Cash and Securities—Segregated for Regulatory Purposes

                 As a result of customer activities, certain Operating Companies are obligated by rules mandated by their primary regulators to segregate or set aside cash or qualified securities to satisfy such regulations, which regulations have been promulgated to protect customer assets.  In addition, substantially all of the Operating Companies are members of various clearing organizations at which cash or securities are deposited as required to conduct day-to-day clearance activities.  Securities segregated for regulatory purposes consisted of Federal Deposit Insurance Corporation insured corporate bonds, which are recorded as Level 2 financial assets, in the amount of $414.7 million and $440.4 million at March 31, 2012 and December 31, 2011, U.S. Treasury Bills of $1,447.4 million and

12

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

$747.9 million at March 31, 2012 and December 31, 2011, which are recorded as Level 1 financial assets and securities purchased under agreements to resell in the amount of $3.3 billion and $3.8 billion as of March 31, 2012 and December 31, 2011, respectively, which amounts approximate fair value.

Securities Borrowed and Securities Loaned

Securities borrowed and securities loaned are recorded at the amount of cash collateral advanced or received.  Securities borrowed transactions require IBG, Inc. to provide counterparties with collateral, which may be in the form of cash, letters of credit or other securities.  With respect to securities loaned, IBG, Inc. receives collateral, which may be in the form of cash or other securities in an amount generally in excess of the fair value of the securities loaned.

IBG, Inc. monitors the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as permitted contractually.  Receivables and payables with the same counterparty are not offset in the unaudited condensed consolidated statements of financial condition.  For these transactions, the fees received or paid by IBG, Inc. are recorded as interest income or interest expense in the unaudited condensed consolidated statements of comprehensive income.

Securities Purchased Under Agreements to Resell

Securities purchased under agreements to resell are treated as collateralized financing transactions and are recorded at contract value, plus accrued interest, which approximates fair value.  The Company’s policy is to obtain possession of collateral with a fair value equal to or in excess of the principal amount loaned under resale agreements.  To ensure that the fair value of the underlying collateral remains sufficient, this collateral is valued daily with additional collateral obtained or excess collateral returned, as permitted under contractual provisions.

Financial Instruments Owned and Sold But Not Yet Purchased

Stocks, government, corporate and municipal bonds, futures and options transactions are reported in the unaudited condensed consolidated financial statements on a trade date basis.  The majority of financial instruments owned and financial instruments sold but not yet purchased are recorded at fair value based upon quoted market prices.  All firm-owned financial instruments pledged to counterparties where the counterparty has the right, by contract or custom, to sell or repledge the financial instruments are classified as financial instruments owned and pledged as collateral in the unaudited condensed consolidated statements of financial condition.

IBG, Inc. also enters into currency forward contracts.  These transactions, which are also reported on a trade date basis, are agreements to exchange a fixed amount of one currency for a specified amount of a second currency at completion of the currency forward contract term.  Unrealized mark-to-market gains and losses on currency forward contracts are reported as components of financial instruments owned or financial instruments sold but not yet purchased in the unaudited condensed consolidated statements of financial condition.  Net earnings or losses are reported as components of interest income in the unaudited condensed consolidated statements of comprehensive income.

Customer Receivables and Payables

Customer securities transactions are recorded on a settlement date basis and customer commodities transactions are recorded on a trade date basis.  Receivables from and payables to customers include amounts due on cash and margin transactions, including futures contracts transacted on behalf of customers.  Securities owned by customers, including those that collateralize margin loans or other similar transactions, are not reported in the unaudited condensed consolidated statements of financial condition.  Amounts receivable from customers that are determined by management to be uncollectible are written off to general and administrative expense.

Receivables from and Payables to Brokers, Dealers and Clearing Organizations

Receivables from brokers, dealers and clearing organizations include amounts receivable for securities not delivered by IBG, Inc. to the purchaser by the settlement date (“fails to deliver”) and margin deposits.  Payables to brokers, dealers and clearing organizations include amounts payable for securities not received by IBG, Inc. from a seller by the settlement date (“fails to receive”).  Receivables and payables to brokers, dealers and clearing organizations also include amounts related to futures contracts executed on behalf of customers as well as net payables and receivables from unsettled trades.

Investments

IBG, Inc. makes certain strategic investments in electronic exchange and investment banking platforms and accounts for these investments under the cost method of accounting or under the equity method of accounting as required under ASC 323,

13

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Investments—Equity Method and Joint Ventures.  Investments are accounted for under the equity method of accounting when IBG, Inc. has significant influence over the investee.  Investments accounted for under the equity method, including where the investee is a limited partnership or limited liability company, are recorded at the fair value amount of IBG, Inc.’s initial investment and adjusted each period for IBG, Inc.’s share of the investee’s income or loss.  IBG, Inc.’s share of the income or losses from equity investments is reported as a component of other income in the unaudited condensed consolidated statements of comprehensive income and the recorded amounts of IBG, Inc.’s equity investments, which are included in other assets in the unaudited condensed consolidated statements of financial condition, increase or decrease accordingly.  Distributions received from equity investees are recorded as reductions to the respective investment balance.

The Company makes non-market making investments in listed common stock and corporate debt securities.  In addition, other non-market making investments are made to further diversify the Company’s holdings.  These investments are accounted for at fair value (Note 6), with gains and losses recorded as a component of other income.

A judgmental aspect of accounting for investments is evaluating whether an other-than-temporary decline in the value of an investment has occurred.  The evaluation of an other-than-temporary impairment is dependent on specific quantitative and qualitative factors and circumstances surrounding an investment, including recurring operating losses, credit defaults and subsequent rounds of financing.  None of IBG, Inc.’s equity investments have readily determinable market values.  All equity investments are reviewed for changes in circumstances or occurrence of events that suggest IBG, Inc.’s investment may not be recoverable.  If an unrealized loss on any investment is considered to be other-than-temporary, the loss is recognized in the period the determination is made.  IBG, Inc. also holds exchange memberships and investments in equity securities of certain exchanges as required to qualify as a clearing member, and strategic investments in corporate stock that do not qualify for equity method accounting.  Such investments are recorded at cost or, if an other-than-temporary impairment in value has occurred, at a value that reflects management’s estimate of the impairment, and are included in other assets in the unaudited condensed consolidated statements of financial condition.  Dividends are recognized as a component of other income as such dividends are received.

Property and Equipment

Property and equipment, which is a component of other assets, consist of purchased technology hardware and software, internally developed software, leasehold improvements and office furniture and equipment.  Property and equipment are recorded at historical cost, less accumulated depreciation and amortization.  Additions and improvements that extend the lives of assets are capitalized, while expenditures for repairs and maintenance are expensed as incurred.  Depreciation and amortization are computed using the straight-line method.  Equipment is depreciated over the estimated useful lives of the assets, while leasehold improvements are amortized over the lesser of the estimated economic useful life of the asset or the term of the lease.  Computer equipment is depreciated over three to five years and office furniture and equipment are depreciated over five to seven years.  Qualifying costs for internally developed software are capitalized and amortized over the expected useful life of the developed software, not to exceed three years.

Comprehensive Income and Foreign Currency Translation

Reported results on a comprehensive basis reflect the Company’s adoption of Accounting Standards Update 2011-05, Comprehensive Income (“ASU 2011-05”) issued in June 2011.  This standard requires the presentation of a Statement of Comprehensive Income, replacing the former Statement of Income.

Comprehensive income consists of two components: net income and other comprehensive income (“OCI”).  OCI is comprised of revenues, expenses, gains and losses that are reported in the comprehensive income section of the statement of comprehensive income, but are excluded from reported net income.  IBG, Inc.’s OCI is comprised of foreign currency translation adjustments.  Previously, OCI was reported as a component of changes in total equity in the statement of financial condition.

IBG, Inc.’s international Operating Companies have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated into U.S. dollars at period-end exchange rates, and revenues and expenses are translated at average exchange rates prevailing during the period.  Translation gains and losses from market making and electronic brokerage activities, respectively, are included in trading gains and in other income in the accompanying unaudited condensed consolidated statements of comprehensive income.  Adjustments that result from translating amounts from a subsidiary’s functional currency are reported as a component of accumulated other comprehensive income.

14

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Revenue Recognition

                 —Trading Gains

Trading gains and losses are recorded on trade date and are reported on a net basis.  Trading gains are comprised of changes in the fair value of trading assets and liabilities (i.e., unrealized gains and losses) and realized gains and losses.  Dividends are integral to the valuation of stocks and interest is integral to the valuation of fixed income instruments.  Accordingly, both dividends and interest income and expense attributable to specific trading assets and liabilities are reported on a net basis as a component of trading gains in the accompanying unaudited condensed consolidated statements of comprehensive income.

                 —Commissions and Execution Fees

Commissions charged for executing and clearing customer transactions are accrued on a trade date basis and are reported as commissions and execution fees in the unaudited condensed consolidated statements of comprehensive income, and the related expenses are reported as execution and clearing expenses, also on a trade date basis.

                 —Interest Income and Expense

The Company earns interest income and incurs interest expense primarily in connection with its Electronic Brokerage customer business and its securities lending activities.  Such interest is recorded on the accrual basis.

Income Taxes

IBG, Inc. accounts for income taxes in accordance with ASC 740, Income Taxes.  The Company’s income tax expense, deferred tax assets and liabilities, and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid.  We are subject to income taxes in both the United States and numerous foreign jurisdictions.  Determining unaudited condensed consolidated income tax expense requires significant judgments and estimates.

Deferred income tax assets and liabilities arise from temporary differences between the tax and financial statement recognition of the underlying assets and liabilities. In evaluating our ability to recover our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results adjusted for the results of discontinued operations and changes in accounting policies and incorporate assumptions including the amount of future state, federal and foreign pretax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax-planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider three years of cumulative operating income (loss).

The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in a multitude of jurisdictions across our global operations.  Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future.  Management is not aware of any such changes that would have a material effect on the Company’s results of operations, cash flows, or financial position.

ASC 740 provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits.  ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.

The Company records tax liabilities in accordance with ASC 740 and adjusts these liabilities when management’s judgment changes as a result of the evaluation of new information not previously available.  Because of the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities.  These differences will be reflected as increases or decreases to income tax expense in the period in which new information is available.

IBG, Inc. recognizes interest related to income tax matters as interest income or expense and penalties related to income tax matters as income tax expense.

Recently Issued Accounting Pronouncements

 Subsequent to the adoption of the ASC, the FASB will issue Accounting Standards Updates (“ASUs”) as the means to add to or delete from, or otherwise amend the ASC.  In 2012, prior to the issuance of the Company’s unaudited condensed consolidated

15

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

financial statements, no ASUs have been issued.  Following is a summary of recently issued ASUs that affected or may affect the Company’s unaudited condensed consolidated financial statements:
 

	Affects	Status
ASU 2011-03	Transfers and Servicing (Topic 860):Reconsideration of Effective Control for Repurchase Agreements	Fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011.  Early application is not permitted.
ASU 2011-04	Fair Value Measurement (Topic 820):Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS	To be applied prospectively for interim and annual periods beginning after December 15, 2011.  Early adoption is not permitted for public entities.
ASU 2011-08	Intangibles - Goodwill and Other (Topic 350):Testing Goodwill for Impairment	Effective for fiscal years beginning after December 15, 2011.  Early adoption is permitted.
ASU 2011-11	Balance Sheet (Topic 210):Disclosures about Offsetting Assets and Liabilities	Effective for fiscal periods beginning on or after January 1, 2013.  Retrospective disclosures for comparative periods presented will be required.

Adoption of those ASUs that became effective during 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, did not have a material effect on those financial statements.  Management is assessing the potential impact on the Company’s financial statements of adopting ASUs that will become effective in the future.

ASC/IFRS Convergence

In February 2010, the SEC issued Commission Statement in Support of Convergence and Global Accounting Standards, a formal statement updating the status of its November 2008 Roadmap for the Potential Use of Financial Statements Prepared in Accordance with International Financial Reporting Standards by U.S. Issuers (“IFRS Roadmap”).  The statement supported convergence of accounting standards and the development of a single set of global accounting standards.  As directed in this statement, the SEC staff issued Work Plan for the Consideration of Incorporating International Financial Reporting Standards into the Financial Reporting System for U.S. Issuers (the “Work Plan”) in May 2010, and issued a follow-up Staff Paper, subtitled Exploring a Possible Method of Incorporation in May 2011.  The Work Plan outlines the steps to be taken to provide the SEC with information to be able to conclude whether IFRS should be adopted for U.S. registrants and the Staff Paper discusses alternative approaches (“Convergence” and “Endorsement”) to adoption that could be applied.  Within the Staff Paper, the SEC Staff has issued a Request for Comment on these alternatives.  The Comment period ended July 31, 2011 and the SEC Staff issued two Staff Papers, A Comparison of U.S. GAAP and IFRS and Analysis of IFRS in Practice on November 16, 2011.

The SEC and U.S. accounting standard setters continue to publicly support a uniform set of global accounting standards, the adoption of IFRS for U.S. registrants and private companies, but the extent and timing of adoption remain uncertain.  The aforementioned Work Plan and other SEC published documents have not committed U.S. registrants to adoption or timing of adoption of IFRS.  The initial adoption for U.S. registrants could be as early as December 31, 2015 or 2016, with a transition date of either January 1, 2013 or 2014 for the initial three year retrospective comparative reporting period.  Management applies versions of IFRS for the stand alone financial statements of several of the Operating Companies, where required, and continues to assess the potential impact of adopting IFRS on the Company’s unaudited condensed consolidated financial statements.

16

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

3. Trading Activities and Related Risks

IBG, Inc.’s trading activities include providing securities market making and brokerage services.  Trading activities expose IBG, Inc. to market and credit risks.  These risks are managed in accordance with established risk management policies and procedures.  To accomplish this, management has established a risk management process that includes:

• a regular review of the risk management process by executive management as part of its oversight role;

• defined risk management policies and procedures supported by a rigorous analytic framework; and

• articulated risk tolerance levels as defined by executive management that are regularly reviewed to ensure that IBG, Inc.’s risk-taking is consistent with its business strategy, capital structure, and current and anticipated market conditions.

Market Risk

IBG, Inc. is exposed to various market risks.  Exposures to market risks arise from equity price risk, foreign currency exchange rate fluctuations and changes in interest rates.  IBG, Inc. seeks to mitigate market risk associated with trading inventories by employing hedging strategies that correlate rate, price and spread movements of trading inventories and related financing and hedging activities.  IBG, Inc. uses a combination of cash instruments and exchange traded derivatives to hedge its market exposures.  The following discussion describes the types of market risk faced:

Equity Price Risk

Equity price risk arises from the possibility that equity security prices will fluctuate, affecting the value of equity securities and other instruments that derive their value from a particular stock, a defined basket of stocks, or a stock index.  IBG, Inc. is subject to equity price risk primarily in financial instruments owned and sold but not yet purchased.  IBG, Inc. attempts to limit such risks by continuously reevaluating prices and by diversifying its portfolio across many different options, futures and underlying securities and avoiding concentrations of positions based on the same underlying security.

Currency Risk

Currency risk arises from the possibility that fluctuations in foreign exchange rates will impact the value of financial instruments.  Exchange rate contracts may include cross-currency swaps and currency futures contracts.  Currency swaps are agreements to exchange future payments in one currency for payments in another currency.  These agreements are used to effectively convert assets or liabilities denominated in different currencies.  Currency futures are contracts for delayed delivery of currency at a specified future date.  IBG, Inc. uses currency swaps to manage the levels of its non-U.S. dollar currency balances and currency cash and futures to hedge its global exposure.

Interest Rate Risk

Interest rate risk arises from the possibility that changes in interest rates will affect the value of financial instruments.  IBG, Inc. is exposed to interest rate risk on cash and margin balances, positions carried in equity securities, options and futures and on its debt obligations.  These risks are managed through investment policies and by entering into interest rate futures contracts.

Credit Risk

IBG, Inc. is exposed to risk of loss if an individual, counterparty or issuer fails to perform its obligations under contractual terms (“default risk”).  Both cash instruments and derivatives expose IBG, Inc. to default risk.  IBG, Inc. has established policies and procedures for mitigating credit risk on principal transactions, including reviewing and establishing limits for credit exposure, maintaining collateral, and continually assessing the creditworthiness of counterparties.

The Company’s credit risk is limited in that substantially all of the contracts entered into are settled directly at securities and commodities clearing houses and a small portion is settled through member firms and banks with substantial financial and operational resources.  IBG, Inc. seeks to control the risks associated with its customer margin activities by requiring customers to maintain collateral in compliance with regulatory and internal guidelines.

In the normal course of business, IBG, Inc. executes, settles, and finances various customer securities transactions.  Execution of these transactions includes the purchase and sale of securities by IBG, Inc. that exposes IBG, Inc. to default risk arising from the potential that customers or counterparties may fail to satisfy their obligations.  In these situations, IBG, Inc. may be required to purchase or sell financial instruments at unfavorable market prices to satisfy obligations to customers or counterparties.  Liabilities

17

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

to other brokers and dealers related to unsettled transactions (i.e., securities fails to receive) are recorded at the amount for which the securities were purchased, and are paid upon receipt of the securities from other brokers or dealers.  In the case of aged securities fails to receive, IBG, Inc. may purchase the underlying security in the market and seek reimbursement for any losses from the counterparty.

For cash management purposes, IBG, Inc. enters into short-term securities purchased under agreements to resell and securities sold under agreements to repurchase transactions (“repos”) in addition to securities borrowing and lending arrangements, all of which may result in credit exposure in the event the counterparty to a transaction is unable to fulfill its contractual obligations.  In accordance with industry practice, repos are collateralized by securities with a market value in excess of the obligation under the contract.  Similarly, securities borrowed and loaned agreements are collateralized by deposits of cash or securities.  IBG, Inc. attempts to minimize credit risk associated with these activities by monitoring collateral values on a daily basis and requiring additional collateral to be deposited with or returned to IBG, Inc. as permitted under contractual provisions.

Concentrations of Credit Risk

IBG, Inc.’s exposure to credit risk associated with its trading and other activities is measured on an individual counterparty basis, as well as by groups of counterparties that share similar attributes.  Concentrations of credit risk can be affected by changes in political, industry, or economic factors.  To reduce the potential for risk concentration, credit limits are established and exposure is monitored in light of changing counterparty and market conditions.  As of March 31, 2012 and December 31, 2011, respectively, the Company did not have any material concentrations of credit risk.

Off-Balance Sheet Risks

IBG, Inc. may be exposed to a risk of loss not reflected in the unaudited condensed consolidated financial statements for futures products, which represent obligations of IBG, Inc. to settle at contracted prices, which may require repurchase or sale in the market at prevailing prices.  Accordingly, these transactions result in off-balance sheet risk as IBG, Inc.’s cost to liquidate such futures contracts may exceed the amounts reported in IBG, Inc.’s unaudited condensed consolidated statements of financial condition.

4. Equity and Earnings Per Share

In connection with its IPO in May 2007, IBG, Inc. purchased 10.0% of the membership interests in IBG LLC from IBG Holdings LLC, became the sole managing member of IBG LLC and began to consolidate IBG LLC’s financial results into its financial statements.  IBG Holdings LLC wholly owns all Class B common stock, which common stock has voting rights in proportion to its ownership interests in IBG LLC, approximately 88.5% as of March 31, 2012.  The unaudited condensed consolidated financial statements reflect the results of operations and financial position of IBG, Inc., including consolidation of its investment in IBG LLC, and IBG Holdings LLC’s ownership interests in IBG LLC are accounted for and reported in these consolidated financial statements as “redeemable noncontrolling interests” (temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (see Note 17 to the unaudited condensed consolidated financial statements ).

Recapitalization and Post-IPO Capital Structure

Immediately prior to and immediately following the consummation of the IPO, IBG, Inc., IBG Holdings LLC, IBG LLC and the members of IBG LLC consummated a series of transactions collectively referred to herein as the “Recapitalization.” In connection with the Recapitalization, IBG, Inc., IBG Holdings LLC and the historical members of IBG LLC entered into an exchange agreement, dated as of May 3, 2007 (the “Exchange Agreement”), pursuant to which the historical members of IBG LLC received membership interests in IBG Holdings LLC in exchange for their membership interests in IBG LLC.  Additionally, IBG, Inc. became the sole managing member of IBG LLC.

In connection with the consummation of the IPO, IBG Holdings LLC used the net proceeds to redeem 10.0% of members’ interests in IBG Holdings LLC in proportion to their interests.  Immediately following the Recapitalization and IPO, IBG Holdings LLC owned approximately 90% of IBG LLC and 100% of IBG, Inc.’s Class B common stock, which has voting power in IBG, Inc. proportionate to the extent of IBG Holdings LLC’s ownership of IBG LLC.

                Since consummation of the IPO and Recapitalization, IBG, Inc.’s equity capital structure has been comprised of Class A and Class B common stock.  All shares of common stock have a par value of $0.01 per share and have identical rights to earnings and dividends and in liquidation.  As described previously in this Note 4, Class B common stock has voting power in IBG, Inc. proportionate to the extent of IBG Holdings LLC’s ownership of IBG LLC.  At March 31, 2012 and December 31, 2011, 1,000,000,000 shares of Class A common stock were authorized, of which 46,063,918 and 46,061,256 shares have been issued; and 45,579,884 and 45,576,791 shares were outstanding, respectively.  Class B common stock is comprised of 100 authorized shares, of which 100 shares were issued and outstanding as of March 31, 2012 and December 31, 2011, respectively.  In addition, 10,000 shares

18

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

of preferred stock have been authorized, of which no shares are issued or outstanding as of March 31, 2012 and December 31, 2011, respectively.

As a result of a federal income tax election made by IBG LLC applicable to the acquisition of IBG LLC member interests by IBG, Inc., the income tax basis of the assets of IBG LLC acquired by IBG, Inc. have been adjusted based on the amount paid for such interests.  Deferred tax assets were recorded as of the IPO date and in connection with the 2011 redemption of IBGH member interests in exchange for Common Stock, which deferred tax assets are a component of Other Assets in the unaudited condensed consolidated statement of financial condition and are being amortized as additional deferred income tax expense over 15 years from the IPO date and from the 2011 redemption date, respectively, as allowable under current tax law.  As of March 31, 2012 and December 31, 2011, the unamortized balance of these deferred tax assets was $293,057 and, $297,881, respectively.

IBG, Inc. also entered into an agreement (the “Tax Receivable Agreement”) with IBG Holdings LLC to pay IBG Holdings LLC (for the benefit of the former members of IBG LLC) 85% of the tax savings that IBG, Inc. actually realizes as the result of tax basis increases.  These payables, net of payments made to IBGH, are reported as Payable to Affiliate in the unaudited condensed consolidated statement of financial condition.

The remaining 15% is accounted for as a permanent increase to additional paid-in capital in the unaudited condensed consolidated statement of financial condition.

The deferred tax assets, payables to IBGH and credits to additional paid in capital arising from stock offerings through March 31, 2012 are:

		Deferred Tax Assets		Payable to IBGH		Additional Paid In Capital
May 3, 2007 (IPO)	$	380,785	$	323,668	$	57,117
August 4, 2011		2,984		2,536		448
	$	383,769	$	326,204	$	57,565

Amounts received and payable under the Tax Receivable Agreement are payable to IBG Holdings LLC annually upon the filing of IBG, Inc.’s federal income tax return.  The Company has paid IBG Holdings LLC a total of $54.6 million through March 31, 2012 pursuant to the terms of the Tax Receivable Agreement.

The Exchange Agreement also provides for future redemptions of member interests and for the purchase of member interests in LLC by IBG, Inc. from Holdings, which could result in IBG, Inc. acquiring the remaining member interests in LLC that it does not own. On an annual basis, holders of Holdings member interests are able to request redemption of such member interests over a minimum eight (8) year period following the IPO; 12.5% annually for seven (7) years and 2.5% in the eighth year.

At the time of the Company’s IPO in 2007, three hundred sixty (360) million shares of authorized common stock were reserved for future sales and redemptions. From 2008 through 2010, redemptions totaling $114 million were funded using cash on hand at LLC. In 2011, the Company issued 1,983,624 shares of Common Stock directly to Holdings in exchange for an equivalent number of shares of member interests in LLC.

As a consequence of these redemption transactions, and distribution of shares to employees (Note 10), IBG, Inc.’s interest in LLC has increased to approximately 11.5%, with Holdings owning the remaining 88.5% as of March 31, 2012.  The redemptions also resulted in an increase in the Holdings interest held by Thomas Peterffy and his affiliates from approximately 84.6% at the IPO to approximately 86.3% at March 31, 2012.

The Exchange Agreement, as amended June 6, 2012, provides that the Company may facilitate the redemption by Holdings of interests held by its members through the issuance of shares of Common Stock through a public offering in exchange for the interests in LLC being redeemed by Holdings. The June 6, 2012 amendment (the “Amendment”) eliminated from the Exchange Agreement an alternative funding method, which provided that upon approval by the board of directors and by agreement of the Company, LLC and Holdings, redemptions could be made in cash.

Stock Repurchase Program

In September 2008, the Company’s Board of Directors approved the repurchase of up to eight (8) million shares of its Class A common stock by LLC.  Shares may be purchased from time to time in the open market and in private transactions if the

19

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Company deems the price appropriate.  In November 2008, 65,800 shares were repurchased at a cost of $866, and are being held as Treasury Stock.

Earnings Per Share

The Company has determined to reflect measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common stockholders.

Basic earnings per share are calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period (as restated):

				Three months ended
				March 31,
			2012		2011
Basic earnings per share:
Net income attributable to common stockholders			$	11,084	$	16,251
Add net income attributable to non-fair value redemption rights				1,239		405
	Net income available for common stockholders - Basic		$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A		45,576,825		42,231,551
		Class B		100		100
				45,576,925		42,231,651
	Basic earnings per share		$	0.27	$	0.39

Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for potentially dilutive common shares (as restated):

 

						Three months ended
						March 31,
					2012			2011
Diluted earnings per share:
	Net income available for common stockholders - Basic				$	12,323	$	16,656
	Adjustments for potentially dilutive common shares					-		-
	Net income available for common stockholders - Diluted				$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A:
			Issued and outstanding			45,576,825		42,231,551
			Potentially dilutive common shares:
				Issuable pursuant to 2007 ROI Unit Stock Plan		374,539		560,171
		Class B				100		100
						45,951,464		42,791,822
	Diluted earnings per share				$	0.27	$	0.39

20

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

      Potentially dilutive common shares could include unvested shares awarded under the SIP.  During the three months ended March 31, 2012 and 2011, the additional shares of Common Stock attributable to the SIP that would have been assumed to be issued, as calculated under the Treasury Stock method, were anti-dilutive and, accordingly, have been excluded from the calculation of diluted earnings per share.

Member and Stockholder Dividends

In March 2012, IBG LLC paid dividends to its members totaling $39.5 million, of which IBG, Inc.’s proportionate share was $4.6 million.  Also in March 2012, the Company paid a quarterly cash dividend of $0.10 per share of Common Stock, totaling $4.6 million.

On April 17, 2012, the Company declared a cash dividend of $0.10 per common share, payable on June 14, 2012 to shareholders of record as of June 1, 2012.

5. Comprehensive Income

Comprehensive income is comprised of Net Income and Other Comprehensive Income (“OCI”).  The Company’s OCI is comprised of foreign currency translation adjustments, which arise from changes in the U.S. dollar value of the net worth of the Company’s international Operating Companies during respective reporting periods.  The following table presents comprehensive income, net of income taxes, and earnings per share, calculated using the two-class method, on comprehensive income (as restated):

			Three months ended
			March 31,
				2012		2011
	Net income attributable to common stockholders		$	11,084	$	16,251
	Add net income attributable to non-fair value redemption rights			1,239		405
	Net income available for common stockholders			12,323		16,656
	Other comprehensive income:
		Cumulative translation adjustment, before income taxes		4,110		2,005
		Income taxes related to items of other comprehensive income		1,484		737
	Other comprehensive income, net of tax			2,626		1,268
	Comprehensive income available for common stockholders		$	14,949	$	17,924
Earnings per share on comprehensive income:
		Basic	$	0.33	$	0.42
		Diluted	$	0.33	$	0.42
	Weighted average common shares outstanding:
		Basic		45,576,925		42,231,651
		Diluted		45,951,464		42,791,822

21

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

6. Fair Value

The following tables set forth, by level within the fair value hierarchy (Note 2), financial assets and liabilities, primarily financial instruments owned and financial instruments sold, but not yet purchased at fair value as of March 31, 2012 and December 31, 2011.  As required by ASC 820, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

		Financial Assets At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	1,447,406	$	414,742	$	-	$	1,862,148
Financial instruments owned:
	Stocks		360,790		-		-		360,790
	Options		3,728,623		-		-		3,728,623
	U.S. and foreign government obligations		10,192		-		-		10,192
	Warrants		122,960		-		-		122,960
	Corporate and municipal bonds		51,179		60,904		-		112,083
	Discount certificates		76,993		-		-		76,993
	Currency forward contracts		-		764		-		764
			4,350,737		61,668		-		4,412,405
Financial instruments owned and pledged as collateral:
	Stocks		1,816,125		-		-		1,816,125
	Corporate and municipal bonds		6,449		-		-		6,449
	U.S. and foreign government obligations		208,643		-		-		208,643
			2,031,217		-		-		2,031,217
			6,381,954		61,668		-		6,443,622
Other assets - investments in non-market making securities
	Investments in common stock		3,504		-		-		3,504
	Investments in other non-market making securities		1,295		97,462		-		98,757
		$	7,834,159	$	573,872	$	-	$	8,408,031

		Financial Liabilities At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,636,238	$	-	$	-	$	1,636,238
	Options		3,911,436		-		-		3,911,436
	Warrants		583		-		-		583
	Corporate bonds		65,758		58,000		-		123,758
	Currency forward contracts		-		2,445		-		2,445
		$	5,614,015	$	60,445	$	-	$	5,674,460

22

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

		Financial Assets At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	747,857	$	440,408	$	-	$	1,188,265
Financial instruments owned:
	Stocks		671,881		-		-		671,881
	Options		4,113,539		-		-		4,113,539
	U.S. and foreign government obligations		10,908		-		-		10,908
	Warrants		113,603		-		-		113,603
	Corporate and municipal bonds		36,587		60,501		-		97,088
	Discount certificates		60,675		-		-		60,675
	Currency forward contracts		-		1,577		-		1,577
			5,007,193		62,078		-		5,069,271
Financial instruments owned and pledged as collateral:
	Stocks		1,373,990		-		-		1,373,990
	Corporate and municipal bonds		4,402		-		-		4,402
	U.S. and foreign government obligations		167,415		-		-		167,415
			1,545,807		-		-		1,545,807
			6,553,000		62,078		-		6,615,078
Other assets - investments in non-market making securities
	Investments in common stock		3,782		-		-		3,782
	Investments in other non-market making securities		1,260		89,472		-		90,732
		$	7,305,899	$	591,958	$	-	$	7,897,857
		Financial Liabilities At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,796,160	$	-	$	-	$	1,796,160
	Options		4,233,533		-		-		4,233,533
	Warrants		240		-		-		240
	Corporate bonds		61,166		61,511		-		122,677
	Currency forward contracts		-		3,538		-		3,538
		$	6,091,099	$	65,049	$	-	$	6,156,148

As of March 31, 2012 and December 31, 2011, the Company did not hold any sovereign obligations of Portugal, Ireland, Italy, Greece or Spain.

7. Collateralized Transactions

The Company enters into securities borrowing and lending transactions and agreements to repurchase and resell securities to finance trading inventory, to obtain securities for settlement and to earn residual interest rate spreads.  In addition, the Company’s customers pledge their securities owned to collateralize margin loans.  Under these transactions, the Company either receives or provides collateral, including equity, corporate debt and U.S. government securities.  Under many agreements, the Company is permitted to sell or repledge securities received as collateral and use these securities to secure repurchase agreements, enter into securities lending transactions or deliver these securities to counterparties to cover short positions.

 The Company also engages in securities financing transactions with and for customers through margin lending.  Under these agreements and transactions, the Company either receives or provides collateral, including U.S. government securities, corporate debt and equity securities.  Customer receivables generated from margin lending activity are collateralized by customer-owned securities held by the Company.  Customers’ required margin levels and established credit limits are monitored continuously by risk

23

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

management staff using automated systems.  Pursuant to Company policy and as enforced by such systems, customers are required to deposit additional collateral or reduce positions, when necessary to avoid automatic liquidation of positions.

Margin loans are extended on a demand basis and are not committed facilities.  Factors considered in the acceptance or rejection of margin loans are the amount of the loan, the degree of leverage being employed in the account and an overall evaluation of the portfolio to ensure proper diversification or, in the case of concentrated positions, appropriate liquidity of the underlying collateral.  Additionally, transactions relating to concentrated or restricted positions are limited or prohibited by raising the level of required margin collateral (to 100% in the extreme case).  Underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations.  Adherence to the Company’s collateral policies significantly limits the Company’s credit exposure to margin loans in the event of a customer’s default.  Under margin lending agreements, the Company may request additional margin collateral from customers and may sell securities that have not been paid for or purchase securities sold but not delivered from customers, if necessary.  At March 31, 2012 and December 31, 2011, approximately $8.5 billion and $7.0 billion, respectively, of customer margin loans were outstanding.

Amounts relating to collateralized transactions at March 31, 2012 and December 31, 2011 are summarized as follows:

			March 31, 2012				December 31, 2011
			Securities		Securities		Securities		Securities
			Received as		Received and		Received as		Received and
			Collateral		Repledged		Collateral		Repledged
Securities lending transactions		$	3,077,123	$	3,054,092	$	2,670,232	$	2,656,879
Agreements to resell (1)			3,612,318		3,612,318		4,173,502		4,173,502
Customer margin securities			11,816,235		972,343		9,797,275		852,739
		$	18,505,676	$	7,638,753	$	16,641,009	$	7,683,120
(1)	At March 31, 2012, $3.3 Billion or 90% (at December 31, 2011, $3.8 Billion or 91%) of securities aquired through agreements to resell have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.

In the normal course of business, the Company pledges qualified securities with clearing organizations to satisfy daily margin and clearing fund requirements.  At March 31, 2012, substantially all government obligations owned were pledged to clearing organizations.

Financial instruments owned and pledged, where the counterparty has the right to repledge, at March 31, 2012 and December 31, 2011 consisted of the following:

		March 31,		December 31,
		2012		2011
Stocks	$	1,816,125	$	1,373,990
Corporate and municipal bonds		6,449		4,402
U.S. and foreign government obligations		208,643		167,415
	$	2,031,217	$	1,545,807

8. Senior Notes Payable

At March 31, 2012 and December 31, 2011, IBG LLC had $30,238 and $101,411, respectively, of senior notes outstanding.  Senior notes have a 3% per annum interest rate.  All outstanding senior notes have an 18-month maturity.  IBG LLC may, solely at its option, redeem the senior notes at any time on or after a specified date in the third month or the sixth month, respectively, after the date on which the senior notes are issued and sold (the “Optional Redemption Date”), at a redemption price equal to 100% of the principal amount of the senior notes to be redeemed plus accrued interest.

24

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

In January 2012, the Company decided to discontinue the Senior Notes Program.  It is the Company’s intention that no new Senior Notes will be issued and all Senior Notes outstanding as of March 31, 2012 will be redeemed by June 2012.

9. Senior Secured Revolving Credit Facility

On May 18, 2010, IBG LLC entered into a $100 million two-year senior secured revolving credit facility with Bank of America, N.A. as administrative agent and Citibank, N.A., as syndication agent.  IBG LLC is the sole borrower under this credit facility.  The facility’s interest rate is indexed to the overnight federal funds rate or to the LIBOR rate for the relevant term, at the borrower’s option, and is secured by a first priority interest in all of the capital stock of each entity owned directly by IBG LLC (subject to customary limitations with respect to foreign subsidiaries).  The facility may be used to finance working capital needs and general corporate purposes, including downstreaming funds to IBG LLC’s regulated broker-dealer subsidiaries as regulatory capital.  This allows IBG LLC to take advantage of market opportunities when they arise, while maintaining substantial excess regulatory capital.  The financial covenants contained in this credit facility are as follows:

• minimum consolidated shareholders’ equity, as defined, of $3.625 billion, with quarterly increases equal to 25% of positive consolidated net income;

• maximum total debt to capitalization ratio of 30%;

• minimum liquidity ratio of 1.0 to 1.0; and

• maximum total debt to net regulatory capital ratio of 35%.

At March 31, 2012 and December 31, 2011, no borrowings were outstanding under this credit facility and IBG LLC was in compliance with all of the covenants.  At maturity, subject to meeting certain terms of the facility, the Company will have an option to convert the facility to a one-year term loan.

10. Employee Incentive Plans

Return on Investment Dollar Units (“ROI Dollar Units”)

From 1998 through January 1, 2006, IBG LLC granted all non-member employees ROI Dollar Units, which are redeemable under the amended provisions of the plan, and in accordance with regulations issued by the Internal Revenue Service (Section 409A of the Internal Revenue Code).  Upon redemption, the grantee is entitled to accumulated earnings on the face value of the certificate, but not the actual face value.  For grants made in 1998 and 1999, grantees may redeem the ROI Dollar Units after vesting on the fifth anniversary of the date of their grant and prior to the tenth anniversary of the date of their grant.  For grants made between January 1, 2000 and January 1, 2005, grantees must elect to redeem the ROI Dollar Units upon the fifth, seventh or tenth anniversary date.  These ROI Dollar Units will vest upon the fifth anniversary of the date of their grant and will continue to accumulate earnings until the elected redemption date.  For grants made on or after January 1, 2006, all ROI Dollar Units shall vest on the fifth anniversary date of their grant and will be automatically redeemed.  Subsequent to the IPO, no additional ROI Dollar Units have been or will be granted, and non-cash compensation to employees will consist primarily of grants of shares of Common Stock as described below under “2007 Stock Incentive Plan.”

As of March 31, 2012 and December 31, 2011, payables to employees for ROI Dollar Units were $9,296 and $10,088, respectively, all of which were vested.  These amounts are included in accounts payable, accrued expenses and other liabilities in the unaudited condensed consolidated statements of financial condition.  Compensation expense for the ROI Dollar Unit plan, included in the unaudited condensed consolidated statements of comprehensive income was $115 and $1,008 for the three months ended March 31, 2012 and 2011 respectively.

2007 ROI Unit Stock Plan

In connection with the IPO, IBG, Inc. adopted the Interactive Brokers Group, Inc. 2007 ROI Unit Stock Plan (the “ROI Unit Stock Plan”).  Under this plan, certain employees of the Group who held ROI Dollar Units, at the employee’s option, elected to invest their ROI Dollar Unit accumulated earnings as of December 31, 2006 in shares of Common Stock.  An aggregate of 1,271,009 shares of Common Stock (consisting of 1,250,000 shares issued under the ROI Unit Stock Plan and 21,009 shares under the 2007 Stock Incentive Plan, as described below), with a fair value at the date of grant of $38,143, were issued to IBG LLC, to be held as Treasury stock, to be distributed to employees in accordance with the following schedule, subject to the conditions below:

• 10% on the date of the IPO (or on the first anniversary of the IPO, in the case of U.S. ROI Unit holders who made the above-referenced elections after December 31, 2006); and

25

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

• an additional 15% on each of the first six anniversaries of the date of the IPO, assuming continued employment with IBG, Inc. and compliance with other applicable covenants.

Of the fair value at the date of grant, $17,806 represented the accumulated ROI Dollar Unit value elected to be invested by employees in Common Stock and such amount was accrued for as of December 31, 2006.  The remainder is being ratably accrued as compensation expense by the Company from the date of the IPO over the requisite service period represented by the aforementioned distribution schedule.  Compensation expense for the 2007 ROI Unit Stock Plan and related grants under the 2007 Stock Incentive Plan, net of the effect of forfeitures, included in the unaudited condensed consolidated statements of comprehensive income for the three months ended March 31, 2012 and 2011 was $880 and $893 respectively.  Estimated future compensation costs for unvested awards at March 31, 2012 are $5.3 million.

2007 Stock Incentive Plan

Under the Interactive Brokers Group, Inc. 2007 Stock Incentive Plan (the “Stock Incentive Plan” or “SIP”), up to 20.0 million shares of Common Stock may be granted and issued to directors, officers, employees, contractors and consultants of IBG, Inc. and its subsidiaries.  The purpose of the Stock Incentive Plan is to promote IBG, Inc.’s long-term financial success by attracting, retaining and rewarding eligible participants.

The Stock Incentive Plan is administered by the Compensation Committee of IBG, Inc.’s Board of Directors.  The Compensation Committee has discretionary authority to determine which employees are eligible to participate in the Stock Incentive Plan and establishes the terms and conditions of the awards, including the number of awards granted to each employee and all other terms and conditions applicable to such awards in individual grant agreements.  Awards are expected to be made primarily through grants of Common Stock.  Stock Incentive Plan awards are subject to issuance over time and may be forfeited upon an employee’s termination of employment or violation of certain applicable covenants prior to issuance, unless determined otherwise by the Compensation Committee.

The Stock Incentive Plan provides that, upon a change in control, the Compensation Committee may, at its discretion, fully vest any granted but unissued shares of Common Stock awarded under the Stock Incentive Plan, or provide that any such granted but unissued shares of Common Stock will be honored or assumed, or new rights substituted therefore by the new employer on a substantially similar basis and on terms and conditions substantially comparable to those of the Stock Incentive Plan.

IBG, Inc. granted awards of Common Stock in connection with the IPO and is expected to continue to grant awards on or about December 31 of each year following the IPO, to eligible employees as part of an overall plan of equity compensation.  Shares of Common Stock granted are distributable to employees in accordance with the following schedule:

• 10% on the first vesting date, which approximates the anniversary of the IPO; and

• an additional 15% on each of the following six anniversaries of the first vesting, assuming continued employment with IBG, Inc. and compliance with non-competition and other applicable covenants.

Shares granted to external directors vest, and are distributed, over a five-year period (20% per year) commencing one year after the date of grant.  14,940 shares have been granted to the external directors cumulatively since the IPO.

26

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Stock Incentive Plan share grants (excluding 21,009 shares issued pursuant to the 2007 ROI Unit Stock Plan above) and the related fair values at the date of grant were:

	Shares		Fair Value at Date of Grant ($000's)
In connection with IPO	927,943	$	27,847
July 31, 2007	16,665		404
December 31, 2007	1,055,206		32,876
December 31, 2008	2,065,432		35,600
December 31, 2009	2,448,031		42,796
December 31, 2010	2,513,738		43,255
December 31, 2011	3,411,613		50,753
January 6, 2012	1,215,866		18,411
	13,654,494	$	251,942

On January 6, 2012, an additional one-time grant was awarded to employees.  This additional grant, which is reported in the table above, is subject to the same terms and conditions as other employee SIP grants.

The following is a summary of Stock Plan activity for the period from January 1 through March 31, 2012:

	Shares
	2007 Stock		2007 ROI Unit
	Incentive Plan		Stock Plan
Balance, December 31, 2011	9,408,994		356,149
Granted	1,215,866		-
Forfeited	(51,666	)	(327	)
Distributed	(2,662	)	(431	)
Balance, March 31, 2012	10,570,532		355,391

Estimated future grants under the Stock Incentive Plan are being accrued for ratably during each year under the ASC 718 “Graded Vesting” method.  Based upon the forfeiture provisions of the Stock Incentive Plan, ASC 718 requires the Company to expense 50% of the grant date value of SIP awards in the year of grant, in addition to expensing the remainder of the grant value over the seven-year service period attributable to each grant.  Compensation expense recognized in the unaudited condensed consolidated statements of comprehensive income for the three months ended March 31, 2012 and 2011 were $19,625 and $9,574, respectively.  Estimated future compensation costs for unvested awards at March 31, 2012 are $48.2 million.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company.  The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.  Distributions of remaining shares granted on or before January 1, 2009 to former employees will occur within 90 days of the anniversary of the termination of employment date over a five (5) year vesting schedule, 12.5% in each of the first four years and 50% in the fifth year.  Distributions of remaining shares granted on or after January 1, 2010 to former employees will occur over the remaining vesting schedule applicable to each grant.  Through March 31, 2012, a total of 22,462 shares have been distributed under these post-employment provisions.  These distributions are included in the Stock Plans activity tables above.

11. Income Taxes

Income tax expense for the three months ended March 31, 2012 and 2011 differs from the U.S. federal statutory rate due to the differing effective tax rates in foreign, state and local jurisdictions where certain operating companies are subject to corporate

27

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

taxation.  Deferred income taxes arise due to the amortization of the deferred tax assets recognized in connection with the Common Stock offerings (Note 4), valuation of THE’s financial assets and liabilities and temporary differences arising from the deductibility of compensation and depreciation expenses in different time periods for book and tax return purposes.  The retained earnings of certain foreign subsidiaries of IBG, Inc., which are considered permanently reinvested, may be subject to additional U.S. income taxes if such earnings were to be distributed.  The Company has not provided deferred U.S income taxes since the tax bases of such subsidiaries exceed their book bases.

12. Commitments, Contingencies and Guarantees

Litigation

The Company is subject to certain pending and threatened legal actions which arise out of the normal course of business.  Litigation is inherently unpredictable, particularly in proceedings where claimants seek substantial or indeterminate damages, or which are in their early stages.  IBG, Inc. cannot predict with certainty the actual loss or range of loss related to such legal proceedings, the manner in which they will be resolved, the timing of final resolution or the ultimate settlement.  Although the results of legal actions cannot be predicted with certainty, it is the opinion of management that the resolution of these actions is not expected to have a material effect, if any, on our business or financial condition, but may have a material impact on the results of operations for a given period.

On February 3, 2010, Trading Technologies International, Inc. (“Trading Technologies”) filed a complaint in the United States District Court for the Northern District of Illinois, Eastern Division, against Interactive Brokers Group, Inc., IBG LLC, IBG Holdings LLC, and Interactive Brokers LLC.  Thereafter, Trading Technologies dismissed Interactive Brokers Group, Inc. and IBG Holdings LLC from the case, leaving only IBG LLC and Interactive Brokers LLC as defendants (“Defendants”).  The operative complaint, as amended, alleges that the Defendants have infringed and continue to infringe twelve U.S. patents held by Trading Technologies.  Trading Technologies is seeking, among other things, unspecified damages and injunctive relief.  The case is in the early stages and discovery has yet to begin.  While it is too early to predict the outcome of the matter, we believe we have meritorious defenses to the allegations made in the complaint and intend to defend ourselves vigorously against them.  However, litigation is inherently uncertain and there can be no guarantee that the Company will prevail or that the litigation can be settled on favorable terms.

IBG, Inc. accounts for potential losses related to litigation in accordance with ASC 450, Contingencies.  As of March 31, 2012 and December 31, 2011, reserves provided for potential losses related to litigation matters were not material.

Guarantees

Certain of the Operating Companies provide guarantees to securities clearing houses and exchanges which meet the accounting definition of a guarantee under ASC 460, Guarantees.  Under the standard membership agreement, members are required to guarantee collectively the performance of other members.  Under the agreements, if another member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet shortfalls.  In the opinion of management, the Operating Companies’ liability under these arrangements is not quantifiable and could exceed the cash and securities they have posted as collateral.  However, the potential for these Operating Companies to be required to make payments under these arrangements is remote.  Accordingly, no contingent liability is carried in the unaudited condensed consolidated statements of financial condition for these arrangements.

In connection with its retail brokerage business, IB LLC performs securities and commodities execution, clearance and settlement on behalf of its customers for whom it commits to settle trades submitted by such customers with the respective clearing houses.  If a customer fails to fulfill its obligation, IB LLC must fulfill the customer’s obligation with the trade counterparty.  No contingent liability is carried on the unaudited condensed consolidated statements of financial condition for such customer obligations.

Other Commitments

Certain clearing houses and clearing banks and firms used by certain Operating Companies are given a security interest in certain assets of those Operating Companies held by those clearing organizations.  These assets may be applied to satisfy the obligations of those Operating Companies to the respective clearing organizations.

13. Segment and Geographic Information

IBG, Inc. operates in two business segments, market making and electronic brokerage.  The Company conducts its market making business principally through its Timber Hill subsidiaries on the world’s leading exchanges and market centers, primarily in

28

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

exchange-traded equities, equity options and equity-index options and futures.  IBG, Inc. conducts its electronic brokerage business through its Interactive Brokers subsidiaries, which provide electronic execution and clearing services to customers worldwide.

There are significant transactions and balances between the Operating Companies, primarily as a result of certain Operating Companies holding exchange or clearing organization memberships, which are utilized to provide execution and clearing services to affiliates.  Charges for transactions between segments are designed to approximate full costs.  Intra-segment and intra-region income and expenses and related balances have been eliminated in this segment and geographic information to accurately reflect the external business conducted in each segment or geographical region.  Corporate items include non-allocated corporate income and expenses that are not attributed to segments for performance measurement, corporate assets and eliminations.

Management believes that the following information by business segment provides a reasonable representation of each segment’s contribution to total net revenues and income before income taxes for the three months ended March 31, 2012 and 2011, and to total assets as of March 31, 2012 and December 31, 2011:

	Three months ended
	March 31,
		2012			2011
Net revenues:
Electronic brokerage	$	159,326		$	163,660
Market making		142,411			202,338
Corporate and eliminations		2,185			1,890
Total net revenues	$	303,922		$	367,888
Income before income taxes:
Electronic brokerage	$	83,390		$	90,086
Market making		65,968			134,666
Corporate and eliminations		319			(2,780	)
Total income before income taxes	$	149,677		$	221,972
		March 31,			December 31,
		2012			2011
Segment assets:
Electronic brokerage	$	23,468,167		$	20,707,771
Market making		14,373,453			14,389,427
Corporate and eliminations		(5,145,222	)		(4,692,833	)
Total assets	$	32,696,398		$	30,404,365

In connection with its ongoing review and analysis of the costs of operating its businesses, commencing in the second quarter of 2011, IBG LLC increased its allocation of corporate expenses to the operating segments in the form of intercompany administrative fees to include non-cash compensation, primarily SIP costs.  Increased intercompany administrative fees, which are eliminated in consolidation, will affect the operating segments’ income before income taxes.  The effect for the three months ended March 31, 2012 was an increase in net costs charged to the Electronic Brokerage segment of $2.1 million, and to the Market Making segment of $1.6 million, respectively, offset by increases in intercompany fee revenue recognized in the Corporate segment.

29

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

The Company operates its automated global business in U.S. and international markets on more than 100 exchanges and market centers.  A significant portion of IBG, Inc.’s net revenues are generated by subsidiaries operating outside the United States.  International operations are comprised of market making and electronic brokerage activities in 24 countries in Europe, Asia and North America (outside the United States).  The following table presents total net revenues and income before income taxes by geographic area for the three months ended March 31, 2012 and 2011:

		Three months ended
		March 31,
		2012			2011
Net revenues:
United States	$	232,416		$	257,608
International		70,571			108,370
Corporate and eliminations		935			1,910
Total net revenues	$	303,922		$	367,888
Income before income taxes:
United States	$	134,635		$	176,448
International		15,915			48,170
Corporate and eliminations		(873	)		(2,646	)
Total income before income taxes	$	149,677		$	221,972

14. Regulatory Requirements

At March 31, 2012, aggregate excess regulatory capital for all of the Operating Companies was $2.7 billion.

TH LLC and IB LLC are subject to the Uniform Net Capital Rule (Rule 15c3-1) under the Exchange Act and the CFTC’s minimum financial requirements (Regulation 1.17), and THE is subject to the Swiss National Bank eligible equity requirement.  Additionally, THSHK is subject to the Hong Kong Securities Futures Commission liquid capital requirement, THA is subject to the Australian Stock Exchange liquid capital requirement, THC and IBC are subject to the Investment Industry Regulatory Organization of Canada risk adjusted capital requirement, IBUK is subject to the U.K. Financial Services Authority financial resources requirement, IBI is subject to the National Stock Exchange of India net capital requirements and IBSJ is subject to the Japanese Financial Supervisory Agency capital requirements. The following table summarizes capital, capital requirements and excess regulatory capital (millions):

		Net Capital/ Eligible Equity		Requirement		Excess
IB LLC	$	1,420	$	197	$	1,223
TH LLC		737		41		696
THE		622		224		398
Other regulated Operating Companies		418		21		397
	$	3,197	$	483	$	2,714

At March 31, 2012, all of the regulated Operating Companies were in compliance with their respective regulatory capital requirements.

Regulatory capital requirements could restrict the Operating Companies from expanding their business and declaring dividends if their net capital does not meet regulatory requirements.  Also, certain entities within IBG, Inc. are subject to other regulatory restrictions and requirements.

15. Related Party Transactions

Receivable from affiliate represents amounts advanced to IBG Holdings LLC and payable to affiliate represents amounts payable to IBG Holdings LLC under the Tax Receivable Agreement (Note 4).

30

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Included in receivable from and payable to customers in the accompanying unaudited condensed consolidated statements of financial condition as of March 31, 2012 and December 31, 2011 were account receivables of directors, officers and their affiliates of $1,345 and $1,291 and payables of $438,637 and $510,623, respectively, arising from the normal course of business as brokerage customers of the Company.

16.  Subsequent Events

As required by ASC 855-10-50, the Company has evaluated subsequent events for adjustment to or disclosure in its unaudited condensed consolidated financial statements through the date the unaudited condensed consolidated financial statements were issued.

No recordable or disclosable events, not otherwise reported in these financial statements or the notes thereto, occurred.

17.  Restatement

Accounting for Noncontrolling Interests in IBG LLC Attributable to IBG Holdings LLC

Subsequent to the issuance of the Company’s 2011 Annual Report on Form 10-K, the Company identified an error in its accounting for noncontrolling interests in IBG LLC attributable to IBG Holdings LLC.  Pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A, prior to the Amendment (Note 4), these interests were required to be accounted for and reported as “redeemable noncontrolling interests” (temporary equity).  The revised accounting results in the reporting of redeemable noncontrolling interests as a separate category in the statement of financial condition, outside of total equity, and at redemption value.  The excess of redemption value over book value is reported as a direct charge to stockholders’ equity (deficit).  There is no effect on total assets or liabilities in the statement of financial condition, or on reported net income attributable to common stockholders.  However, as a result of the classification of IBG Holdings LLC’s noncontrolling interests in IBG LLC as redeemable noncontrolling interests, the calculation of earnings per share was affected, as described below.

Effect on Earnings Per Share (reported in the Statement of Comprehensive Income):

As a result of the error affecting redeemable noncontrolling interests described above, pursuant to the requirements of ASC 480-10-S99, the Company was required to calculate earnings per share using the two-class method to give effect in its calculation of net income available to common stockholders to the cash redemption feature as an other than fair value redemption feature.  For the Company, under U.S. GAAP, this other than fair value redemption feature is measured by the change in the difference between the fair value of LLC and the fair value of the Company.  This difference equals the Company’s share of the tax benefits arising from the sale of stock in May 2007 at the IPO and in connection with the August 2011 member interest redemption transaction, or $57.6 million that has been retained by the Company.

Under the two-class method as applied by the Company (Note 2), the recognition of the cash redemption feature does not affect net income attributable to common stockholders, but allocates a portion of earnings to this other than fair value redemption right that would otherwise be available to common stockholders, calculated as the previously described difference between the respective fair values of LLC and the Company.  The effect on earnings per share was:

	Three months ended March 31,
		2012		2011
Basic earnings per share - as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Basic earnings per share, as restated	$	0.27	$	0.39
Diluted earnings per share, as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Diluted earnings per share, as restated	$	0.27	$	0.39

31

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements (Continued)

(dollars in thousands, except shares and per share amounts, unless otherwise noted)

Effect on the Statement of Financial Condition:

(in thousands)			Previously Reported		Adjustments for Noncontrolling Interests			As Restated
March 31, 2012
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)

Effect on the Statement of Changes in Equity:

The following information is provided to facilitate readers’ understanding of the effects of these errors on the ending balances reported in the statement of changes in equity as of March 31, 2012 and 2011:

March 31, 2012
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220

March 31, 2011
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	535,542	$	(535,542	)	$	-
	Retained earnings (accumulated deficit)	$	108,755	$	(1,309,490	)	$	(1,200,735	)
Total stockholders' equity (deficit)		$	505,258	$	(1,702,291	)	$	(1,197,033	)
Other noncontrolling interests		$	3,935,539	$	(3,933,977	)	$	1,562
Total equity (deficit)		$	4,440,797	$	(5,636,268	)	$	(1,195,471	)
Redeemable noncontrolling interests		$	-	$	5,636,268		$	5,636,268

*****

32

ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

             The following discussion should be read in conjunction with the unaudited condensed consolidated financial statements and the related notes in Item 1, included elsewhere in this report.  In addition to historical information, the following discussion also contains forward-looking statements that include risks and uncertainties.  Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors, including those set forth under the heading “Risk Factors” in our Amended Annual Report on Form 10-K/A filed with the Securities Exchange Commission (“SEC”) on August 31, 2012 and elsewhere in this report.

Introduction

IBG, Inc. is a holding company whose primary asset is ownership of approximately 11.5% of the membership interests of the Group.

We are an automated global electronic broker and market maker specializing in routing orders and executing and processing trades in securities, futures and foreign exchange instruments on more than 100 electronic exchanges and trading venues around the world.  Since our inception in 1977, we have focused on developing proprietary software to automate broker-dealer functions.  The advent of electronic exchanges in the last 22 years has provided us with the opportunity to integrate our software with an increasing number of exchanges and trading venues into one automatically functioning, computerized platform that requires minimal human intervention.

Business Segments

The Company reports its results in two business segments, electronic brokerage and market making.  These segments are analyzed separately as we derive our revenues from these two principal business activities as well as allocate resources and assess performance.

· Electronic Brokerage.  We conduct our electronic brokerage business through our Interactive Brokers (“IB”) subsidiaries.  As an electronic broker, we execute, clear and settle trades globally for both institutional and individual customers.  Capitalizing on the technology originally developed for our market making business, IB’s systems provide our customers with the capability to monitor multiple markets around the world simultaneously and to execute trades electronically in these markets at a low cost, in multiple products and currencies from a single trading account.  We offer our customers access to all classes of tradable, exchange-listed products, including stocks, bonds, options, futures, forex and mutual funds traded on more than 100 exchanges and market centers and in 19 countries around the world seamlessly.

During the fourth quarter of 2011, we introduced the Interactive Brokers Information System (“IBIS”), which offers customers a robust suite of informational tools at a fraction of the cost of traditional research platforms.  IBIS includes live quotes, newswire feeds, calendars of economic and earnings events, fundamental research data, charts and more in an interface that can be configured to customers’ needs.  The response from customers has been positive and we continue to devote resources to the further development of this tool with additional content and functions.

· Market Making.  We conduct our market making business through our Timber Hill subsidiaries.  As one of the largest market makers on many of the world’s leading exchanges, we provide liquidity by offering competitively tight bid/offer spreads over a broad base of over 877,000 tradable, exchange-listed products.  As principal, we commit our own capital and derive revenues or incur losses from the difference between the price paid when securities are bought and the price received when those securities are sold.  Because we provide continuous bid and offer quotations and we are continuously both buying and selling quoted securities, we may have either a long or a short position in a particular product at a given point in time.  Our entire portfolio is evaluated each second and continuously rebalanced throughout the trading day, minimizing the risk of our portfolio at all times.  This real-time rebalancing of our portfolio, together with our real-time proprietary risk management system, enables us to curtail risk and to be profitable in both up-market and down-market scenarios.

When we use the terms “we,” “us,” and “our,” we mean IBG, Inc. and its subsidiaries for the periods presented.

Executive Overview

First Quarter Results:  Diluted earnings per share on a comprehensive basis were $0.33 for the quarter ended March 31, 2012 as compared to diluted earnings per share of $0.42 for the same period in 2011.

Reported results on a comprehensive basis reflect the GAAP convention adopted in 2011 that requires the reporting of currency translation results contained in other comprehensive income as part of reportable earnings. Previously, currency translation results were reported only as a component of changes in total equity in the statement of financial condition.

33

Currency translation effects are largely a result of our currency strategy.  We have determined to base our net worth in GLOBALs, a basket of major currencies in which we hold our equity.  Approximately 63% of our equity is denominated in currencies other than U.S. dollars1.  The effects of our currency strategy appear in two places in the financial statements: (1) as a component of trading gains in the unaudited condensed consolidated statement of comprehensive income and (2) as other comprehensive income (“OCI”) in the unaudited condensed consolidated statement of financial condition.  As described above, the full effect of the GLOBAL is captured in comprehensive income.

On a non-comprehensive basis, which excludes the effect of changes in the U.S. dollar value of the Company’s non-U.S. subsidiaries, diluted earnings per share were $0.27 for the three months ended March 31, 2012, as compared to $0.39 for the three months ended March 31, 2011.

In light of the weakening of the U.S. dollar against a number of other currencies, adding OCI to net income increased diluted comprehensive earnings per share by $0.06 for the current quarter.

Consolidated:  For the three months ended March 31, 2012, our net revenues were $303.9 million and income before income taxes was $149.7 million, as compared to net revenues of $367.9 million and income before income taxes of $222.0 million for the corresponding period in 2011.  This decrease was driven by a swing in currency translation gains, which accounted for 76% of the decrease in income before income taxes.  Currency translation effects are reported as part of Trading Gains in the Market Making segment.  Higher employee compensation and benefits accounted for an additional 14% of this decline.  The increase in employee compensation and benefits expense was largely a result of a special discretionary grant of restricted stock units awarded on January 6, 2012, as well as a correction to our method for recognizing expenses related to our 2007 Stock Incentive Plan (“SIP”).  The special award was made to provide our employees with greater equity participation in the Company and was designed to give lower compensated employees a proportionally higher award.  The corrected accounting treatment accelerates the recognition of SIP-related compensation expense to earlier years and decreases expense recognition in subsequent years, total expense over the life cycle of the SIP grants is unchanged.2  Net interest income increased 16% in the three months ended March 31, 2012, as compared to the corresponding period last year driven by increases in cash balances, net fees from securities borrowed and loaned transactions and a reduction in interest paid on our senior notes.  Trading gains decreased 31% in the three months ended March 31, 2012, as compared to the corresponding period last year due to an unfavorable swing in currency translation and a less favorable trading environment that featured lower actual-to-implied volatility and lower average volatility, as measured by the Chicago Board Options Exchange Volatility Index (“VIX”).  Commissions and execution fees were 8% lower than those of the year-ago quarter as a result of lower customer volume.  Our pre-tax margin for the three months ended March 31, 2012 was 49%, as compared to 60% for the corresponding period in 2011.

Brokerage:  During the three months ended March 31, 2012, income before income taxes in our electronic brokerage segment decreased 7% as compared to the corresponding period in 2011.  This reflects declines in commissions and execution fees, partially offset by an increase in net interest income and a decrease in execution and clearing fee expenses.  Commissions decreased by 8% from the year-ago quarter as a result of lower customer volume, primarily in stocks, on a stable number of Daily Average Revenue Trades (“DARTs”).  The smaller average trade size is consistent with our implementation, during the second quarter of 2011, of higher risk margin requirements for low value securities.  Total DARTs for cleared and execution-only customers increased 1% to approximately 428,000 during the three months ended March 31, 2012, as compared to approximately 423,000 during the three months ended March 31, 2011, while commissions per cleared DART decreased 8% to $4.01, as compared to $4.38 for the quarter ended March 31, 2011.  Execution and clearing expenses were 13% lower on decreased customer volume.  The increase in net interest income was attributable to net fees and interest from securities borrowed and loaned transactions and increased customer cash balances.  Pre-tax margin decreased from 55% to 52% for the three months ended March 31, 2011 and 2012, respectively.  Customer equity grew by 17%, to $28.9 billion, from the year-ago quarter.

Market Making:  During the three months ended March 31, 2012, income before income taxes in our market making segment decreased 51%, from $134.6 million to $66.0 million.  This decrease was driven by a swing in currency translation gains, which contributed 80% of the decline, reflecting a $0.9 million loss in this quarter, compared to a $54.0 million gain in the year-ago quarter.  Currency translation effects are reported as part of Trading Gains in the Market Making segment.  Trading gains were also impacted by lower actual-to-implied volatility and a decrease in average volatility, as measured by the VIX.  Execution and clearing expenses were 9% higher during the three months ended March 31, 2012 than the year-ago quarter due to a 21% increase in options trading volumes.  Pre-tax margin decreased to 46% in the first quarter of 2012 as compared to 67% in the corresponding period of 2011.

1 For a full description of our currency strategy, please see pages 52-53, Foreign Currency Exposure.

2 The corrected accounting method is explained in Note 21 to our audited consolidated financial statements in our Amended Annual Report on  Form 10-K/A, filed with the SEC on August 31, 2012.

34

     The following tables present historical trading volumes for our business.  Volumes are among several drivers in our business.

TRADE VOLUMES:
(in 000's, except %)					Brokerage
	Market		Brokerage		Non				Avg. Trades
	Making	%	Cleared	%	Cleared	%	Total	%	per U.S.
Period	Trades	Change	Trades	Change	Trades	Change	Trades	Change	Trading Day
2007	99,086		72,931		16,638		188,655		752
2008	101,672	3%	120,195	65%	16,966	2%	238,833	27%	944
2009	93,550	-8%	127,338	6%	13,636	-20%	234,524	-2%	934
2010	75,169	-20%	133,658	5%	18,732	37%	227,559	-3%	905
2011	63,602	-15%	160,567	20%	19,187	2%	243,356	7%	968
1Q2011	14,488		38,023		4,458		56,969		919
1Q2012	15,045	4%	37,521	-1%	4,826	8%	57,392	1%	926

CONTRACT AND SHARE VOLUMES:
(in 000's, except %)
TOTAL	Options	%	Futures	%	Stocks	%
Period	(contracts)	Change	(contracts)	Change	(shares)	Change
2007	673,144		83,134		47,324,798
2008	757,732	13%	108,984	31%	55,845,428	18%
2009	643,380	-15%	82,345	-24%	75,449,891	35%
2010	678,856	6%	96,193	17%	84,469,874	12%
2011	789,370	16%	106,640	11%	77,730,974	-8%
1Q2011	168,164		24,138		22,028,447
1Q2012	180,786	8%	21,690	-10%	17,862,025	-19%

MARKET MAKING	Options	%	Futures	%	Stocks	%
Period	(contracts)	Change	(contracts)	Change	(shares)	Change
2007	447,905		14,520		24,558,314
2008	514,629	15%	21,544	48%	26,008,433	6%
2009	428,810	-17%	15,122	-30%	26,205,229	1%
2010	435,184	1%	15,371	2%	19,165,000	-27%
2011	503,053	16%	15,519	1%	11,788,769	-38%
1Q2011	97,595		3,428		2,633,325
1Q2012	118,438	21%	2,828	-18%	2,138,451	-19%

Notes:

1. Futures contract volume includes options on futures.

2. In Brazil, an equity option contract typically represents one share of the underlying stock; however, the typical minimum trading quantity is 100 contracts. To make a fair comparison to volume at other exchanges, we have adopted a policy of reporting Brazilian equity options contracts divided by their trading quantity of 100.

35

CONTRACT AND SHARE VOLUMES, continued:

(in 000’s, except %)

BROKERAGE TOTAL	Options	%	Futures	%	Stocks	%
Period	(contracts)	Change	(contracts)	Change	(shares)	Change
2007	225,239		68,614		22,766,484
2008	243,103	8%	87,440	27%	29,836,995	31%
2009	214,570	-12%	67,223	-23%	49,244,662	65%
2010	243,672	14%	80,822	20%	65,304,874	33%
2011	286,317	18%	91,121	13%	65,942,205	1%
1Q2011	70,569		20,710		19,395,122
1Q2012	62,348	-12%	18,862	-9%	15,723,574	-19%

BROKERAGE CLEARED	Options	%	Futures	%	Stocks	%
Period	(contracts)	Change	(contracts)	Change	(shares)	Change
2007	51,586		66,278		20,353,584
2008	77,207	50%	85,599	29%	26,334,752	29%
2009	93,868	22%	66,241	-23%	46,627,344	77%
2010	103,054	10%	79,144	19%	62,077,741	33%
2011	145,993	42%	89,610	13%	63,098,072	2%
1Q2011	33,762		20,332		18,722,839
1Q2012	33,377	-1%	18,646	-8%	15,115,753	-19%

Notes:

1. Futures contract volume includes options on futures

BROKERAGE STATISTICS
(in 000's, except % and where noted)
	1Q2012	1Q2011	% Change
Total Accounts	195	168	16%
Customer Equity (in billions) *	$28.9	$24.8	17%
Cleared DARTs	391	387	1%
Total Customer DARTs	428	423	1%
Cleared Customers (in $'s, except DART per account)
Commission per DART	$4.01	$4.38	-8%
DART per Avg. Account (Annualized)	511	597	-14%
Net Revenue per Avg. Account (Annualized)	$3,240	$3,891	-17%

* Excluding non-customers (e.g. Directors and Officers)

36

Business Environment

Market conditions were less favorable during the first quarter of 2012 as compared to the same period in 2011.  Lighter trading volumes in exchange-traded products and lower volatility levels dampened profits for both our brokerage and market making businesses.  Although customer trading activity was lighter, we continued to see steady growth in the number of customer brokerage accounts and customer equity, which increased 16% and 17%, respectively, over the first quarter of 2011.

A summary of market conditions that affected our business this quarter follows:

Global trading volumes.  According to data received from exchanges worldwide, volumes in exchange-listed equity-based options decreased by approximately 4% globally and 8% in the U.S., as compared to the corresponding quarter in 2011.  During the first quarter of 2012 we accounted for approximately 9.5% of the exchange-listed equity-based options (including options on ETFs and stock index products) volume traded worldwide and approximately 13.3% of exchange-listed equity-based options volume traded in the U.S.  This compares to approximately 8.4% of the exchange-listed equity-based options volume traded worldwide and approximately 11.4% of the exchange-listed equity-based options volume traded in the U.S. in the first quarter of 2011.  It is important to note that market share is not directly correlated with our profits.

See the tables on pages 35 – 36 of this Quarterly Report on Form 10-Q for additional details regarding our trade volumes, contract and share volumes and brokerage statistics.

Bid/Offer Spreads. After reaching a historic low in the third quarter of 2010, bid/offer spreads on U.S. exchange-traded options have been gradually widening over the intervening quarters.  As reported by the NASDAQ OMX PHLX market, bid/offer spreads in the first quarter were approximately 12% wider than the corresponding period in 2011.  We believe this increase can be partly attributed to the heightened scrutiny over high frequency trading firms that began after the May 2010 Flash Crash.  Regulators and exchanges began enacting new rules that year that eliminated some of the advantages high frequency traders (“HFTs”) had over registered market makers.  Some of these changes did not come into effect until last year, leading to the gradual rise in spreads.  The Dodd-Frank Wall Street Reform and Consumer Protection Act, which was signed into law in July 2010, is expected to impose additional regulations on HFTs.  The final rules are not yet clear, as regulators continue to work on major provisions of the Act.

Volatility.  Our market making profits are generally correlated with market volatility since we typically maintain an overall long volatility position, which protects us against a severe market dislocation in either direction.  Based on the VIX, the average volatility during the first quarter was approximately 2% lower than it was in the first quarter of 2011.

The ratio of actual to implied volatility is also meaningful to our results.  Because the cost of hedging our positions is based on implied volatility, while our trading profits are, in part, based on actual market volatility, a higher ratio is generally favorable and a lower ratio generally has a negative effect on our trading gains.  This ratio averaged approximately 51% during the first quarter, as compared to 87% in the fourth quarter of 2011 and 70% in the year-ago quarter.

Currency fluctuations.  As a global market maker trading on exchanges around the world in multiple currencies, we are exposed to foreign currency risk.  We actively manage this exposure by keeping our net worth in proportion to a defined basket of major currencies (the “GLOBAL”).  Because we report our financial results in U.S. dollars, the change in the value of the GLOBAL to the U.S. dollar affects our earnings.  During the first quarter of 2012, the value of the GLOBAL as expressed in U.S. dollars increased 0.7% compared to the previous quarter which positively affected our comprehensive earnings.

Certain Trends and Uncertainties

We believe that our continuing operations may be favorably or unfavorably impacted by the following trends that may affect our financial condition and results of operations.

· Over the past several years, the effects of market structure changes, competition (in particular, from HFTs) and market conditions have, during certain periods, exerted downward pressure on bid/offer spreads realized by market makers.

· Retail broker-dealer participation in the equity markets has fluctuated over the past few years due to investor sentiment, market conditions and a variety of other factors.  Retail transaction volumes may not be sustainable and are not predictable.

· In recent years, in an effort to improve the quality of their executions as well as increase efficiencies, market makers have increased the level of automation within their operations, which may allow them to compete more effectively with us.

· Regulatory and legislative authorities have increased their scrutiny of equity and option market makers, hedge funds and soft dollar practices.  New legislation or modifications to existing regulations and rules could occur in the future.

· Further consolidation among market centers this may adversely affect the value of our smart routing software.

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·   A driver of our market making profits is the relationship between actual and implied volatility in the equities markets.  The cost of maintaining our conservative risk profile is based on implied volatility, while our profitability, in part, is based on actual volatility.  Hence, our profitability is increased when actual volatility runs above implied volatility and it is decreased when actual volatility falls below implied volatility.  Implied volatility tends to lag actual volatility.

                 See “Risk Factors in Part I, Item 1A of the Company’s Annual Report on Form 10-K/A filed with the SEC on August 31, 2012 and elsewhere in this report for a discussion of other risks that may affect our financial condition and results of operations.

38

Results of Operations

                 The tables in the period comparisons below provide summaries of our revenues and expenses.  The period-to-period comparisons below of financial results are not necessarily indicative of future results.  The following table sets forth our unaudited condensed consolidated results of operations for the indicated periods (as restated):

			Three Months
			Ended March 31,
			2012	2011
			(in millions except share and per share data)
Revenues:
	Trading gains		$137.3	$200.3
	Commissions and execution fees		100.9	109.2
	Interest income		66.6	58.7
	Other income		18.3	17.4
		Total revenues	323.1	385.6
	Interest expense		19.2	17.7
		Total net revenues	303.9	367.9
Non-interest expenses:
	Execution and clearing		64.6	66.2
	Employee compensation and benefits		62.7	52.4
	Occupancy, depreciation and amortization		9.9	9.2
	Communications		5.7	5.5
	General and administrative		11.3	12.6
		Total non-interest expenses	154.2	145.9
Income before income taxes			149.7	222.0
Income tax expense			8.7	18.7
Net income			141.0	203.3
	Less net income attributable to noncontrolling interests		129.9	187.0
Net income attributable to common stockholders			$11.1	$16.3
Earnings per share:
	Basic		$0.27	$0.39
	Diluted		$0.27	$0.39
Weighted average common shares outstanding:
	Basic		45,576,925	42,231,651
	Diluted		45,951,464	42,791,822

Comprehensive income:
	Net income attributable to common stockholders		$11.1	$16.3
	Other comprehensive income:
		Cumulative translation adjustment, before income taxes	4.1	1.9
		Income taxes related to items of other comprehensive income	1.5	0.7
	Other comprehensive income, net of tax		2.6	1.2
Comprehensive income attributable to common stockholders			$13.7	$17.5
Comprehensive income attributable to noncontrolling interests:
		Net income attributable to noncontrolling interests	129.9	$187.0
		Other comprehensive income - cumulative translation adjustment	31.6	16.6
Comprehensive income attributable to noncontrolling interests			$161.5	$203.6

39

Three Months Ended March 31, 2012 Compared to the Three Months Ended March 31, 2011

Net Revenues

Total net revenues for the quarter ended March 31, 2012 decreased $64.0 million or 17%, to $303.9 million from $367.9 million during the quarter ended March 31, 2011.  The decrease in net revenues was primarily due to decreases in trading gains and commissions and execution fees, partially offset by an increase in net interest income compared to the year-ago quarter.  Increased cash balances and a reduction in interest paid on our senior notes contributed to an increase in net interest income.  A decrease in trading gains was driven by an unfavorable swing in currency translation, a decrease in the ratio of actual to implied volatility and a decrease in average volatility, as measured by the VIX, as compared to the year-ago quarter.  Trading volume is an important driver of revenues and costs for both our electronic brokerage segments and market making segments.  During the first quarter of 2012, options contracts executed by our subsidiaries increased by 8% while futures contracts and stock shares volume decreased by 10% and 19% respectively.

Trading Gains.  Trading gains for the quarter ended March 31, 2012 decreased $63.0 million, or 31%, to $137.3 million from $200.3 million for the quarter ended March 31, 2011.  As market makers, we provide liquidity by buying from sellers and selling to buyers.  During the quarter ended March 31, 2012, our market making operations executed 15.0 million trades, an increase of 4% as compared to the number of trades executed in the quarter ended March 31, 2011.  Options contracts increased 21% as a result of a tightening of our bid-offer spreads, which may have increased volume while reducing per contract gains, while futures contracts and stock shares decreased by 18% and 19%, respectively, for the quarter ended March 31, 2012 as compared to the year-ago quarter.  The decrease in trading gains was driven by an unfavorable swing in currency translation, which contributed 88% of the decrease, reflecting a $0.9 million loss in the first quarter of 2012 as compared to a $54.0 million gain in same period of 2011.  As part of managing our overall exposure to foreign currency fluctuations, we maintain a portion of our capital in a basket of currencies we call the GLOBAL.  A discussion of our approach to managing foreign currency exposure is contained in Part I, Item 3 of this Quarterly Report on Form 10-Q entitled “Quantitative and Qualitative Disclosures about Market Risk.”

Trading gains were also negatively impacted by a 2% decrease in average volatility, as measured by the VIX, which decreased to 18, for the three months ended March 31, 2012 as compared to the year-ago quarter.  In addition, the ratio of actual to implied volatility decreased 28% to 51% for the three months ended March 31, 2012 as compared to the same period last year.  Acting to offset those factors, bid-offer spreads on U.S. exchange-traded options, as reported by the NASDAQ OMX PHLX market, were approximately 12% wider during the first quarter of 2012 than during the corresponding period in 2011.

Included in trading gains are net dividends.  Dividend income and expense arise from holding market making positions over dates on which dividends are paid to shareholders of record.  When a stock pays a dividend, its market price is generally adjusted downward to reflect the value paid to the shareholders of record, which will not be received by those who purchase stock after the ex-dividend date.  Hence, the apparent gains and losses due to these price changes, reflecting the value of dividends paid to shareholders, must be taken together with the dividends paid and received, respectively, to accurately reflect the results of our market making operations.

Commissions and Execution Fees.  Commissions and execution fees for the quarter ended March 31, 2012 decreased $8.3 million, or 8%, to $100.9 million, as compared to the quarter ended March 31, 2011.  The decrease was driven by lower customer stock, options and futures volume on a stable number of DARTs.  This indicates smaller average trade size, which is consistent with our implementation during the second quarter of 2011 of higher risk margin requirements for low value securities, mostly on non-U.S. exchanges.  While this may somewhat curtail stock commissions, we believe this to be a prudent risk management measure.  Customer volume in options and futures contracts and stock shares decreased by 12%, 9% and 19%, respectively, for the quarter ended March 31, 2012 from the corresponding period in 2011.  Total DARTs for cleared and execution-only customers for the quarter ended March 31, 2012 increased 1% to approximately 428,000, as compared to approximately 423,000 during the quarter ended March 31, 2011.  Average commission per DART for cleared customers, for the quarter ended March 31, 2012, decreased by 8% to $4.01, as compared to $4.38 for the quarter ended March 31, 2011.  DARTs for cleared customers, i.e., customers for whom we execute trades as well as clear and carry positions, increased 1% to approximately 391,000, for the quarter ended March 31, 2012, as compared to approximately 387,000 for the quarter ended March 31, 2011.The number of customer accounts grew by 16% to approximately 195,000 at March 31, 2012, as compared to approximately 168,000 at March 31, 2011.

Interest Income and Interest Expense.  Net interest income (interest income less interest expense) for the quarter ended March 31, 2012 increased $6.4 million, or 16%, to $47.4 million, as compared to the quarter ended March 31, 2011.  Net interest income was derived primarily from the electronic brokerage segment during the quarter ended March 31, 2012 .  Net interest earned by electronic brokerage increased $5.2 million, or 14%, to $42.3 million, as compared to the quarter ended March 31, 2011.  Net fees and interest earned from securities borrowed and loaned transactions increased $4.3 million for the quarter ended March 31, 2012 as compared to the year–ago quarter.  During the third quarter of 2011 we introduced to customers our Stock Yield Enhancement Program, which provides an opportunity for customers with fully-paid stock to allow IB to lend it out.  In exchange for lending out their stock, our customers receive 50% of the stock loan fees.  IB places cash collateral securing the loans in the customers’ accounts.  Average customer cash balances increased by 16%, to $18.79 billion, while average customer fully secured margin borrowings were relatively unchanged, at

40

$7.87 billion, for the quarter ended March 31, 2012, as compared to $16.20 billion and $7.84 billion, respectively, for the quarter ended March 31, 2011.

The average Fed Funds effective rate decreased 5 basis points to 0.10% for the quarter ended March 31, 2012 as compared to the quarter ended March 31, 2011.

 For market making, net interest income increased $2.3 million from the corresponding period last year to $4.5 million.  As a result of the way we have integrated our market making and securities lending systems, our trading income and our net interest income are interchangeable and depend on the mix of market making positions in our portfolio.  When implied interest rates in the equity and equity options and futures markets exceed the actual interest rates available to us, our market making systems tend to buy stock and sell it forward, which produces higher trading gains and lower net interest income.  When these rates are inverted, our market making systems tend to sell stock and buy it forward, which produces lower trading gains and higher net interest income.  Net interest income from firm accounts increased $3.2 million. This increase was offset by a decrease in net interest earned from securities borrowed and loaned.  Net interest earned from securities borrowed and loaned is also affected by the level of demand for securities positions held by our market making companies and by our customers.

Other Income.  Other income, for the quarter ended March 31, 2012, increased $0.9 million, or 5%, to $18.3 million, as compared to the quarter ended March 31, 2011.  The increase was due to higher brokerage segment revenue from market data fees and minimum activity fees.

Non-Interest Expenses

Non-interest expenses, for the quarter ended March 31, 2012, increased by $8.3 million, or 6%, to $154.2 million from $145.9 million, during the quarter ended March 31, 2011. The increase was primarily due to higher employee compensation and benefits expenses partially offset by lower execution and clearing fees and lower general and administrative fees.  As a percentage of total net revenues, non-interest expenses increased to 51% for the quarter ended March 31, 2012 from 40% during the corresponding period in 2011.

Execution and Clearing.  Execution and clearing expenses for the quarter ended March 31, 2012, decreased $1.6 million, or 2%, to $64.6 million, as compared to the quarter ended March 31, 2011.  The decrease resulted from a 10% decrease in futures contract volume and a 19% decrease in stock shares volume offset by an 8% increase in options contract volume traded during the quarter ended March 31, 2012.

Employee Compensation and Benefits.  Employee compensation and benefits expenses, for the quarter ended March 31, 2012, increased by $10.3 million, or 20%, to $62.7 million, as compared to the quarter ended March 31, 2011.  The increase in employee compensation and benefits expense was largely a result of a special discretionary stock grant of restricted stock units awarded on January 6, 2012, as well as a correction to our method for recognizing expenses related to SIP1, which increased SIP-related expenses by $3.1 million and $3.5 million, respectively, compared the year-ago quarter.  The special stock award was made to provide our employees with greater equity participation in the Company and was designed to give lower compensated employees a proportionally higher award.  Although the corrected accounting treatment accelerates the recognition of SIP-related compensation expense to earlier years and decreases expense recognition in subsequent years, total expense over the life cycle of the SIP grants is unchanged.  The average number of employees increased to 880 for the quarter ended March 31, 2012, as compared to 859 for the corresponding period in 2011.  As we continue to grow, our focus on automation has allowed us to maintain a relatively small staff.  As a percentage of total net revenues, employee compensation and benefits expenses were 21% and 14%, for the quarters ended March 31, 2012 and 2011, respectively.

General and Administrative.  General and administrative expenses, for the quarter ended March 31, 2012, decreased $1.3 million, or 10% to $11.3 million, as compared to the quarter ended March 31, 2011.  The decrease in general and administrative expenses was primarily due to lower other administrative fees and non-income related taxes.

1 The corrected accounting method is explained in Note 21 to our audited consolidated financials statements in our Amended Annual Report on  Form 10-K/A, filed with the SEC on August 31, 2012.

41

Business Segments

The following table sets forth the net revenues and non-interest expenses and income before income taxes of our business segments:

		Three Months
		Ended March 31,
		2012		2011
		(in millions)
Electronic Brokerage	Net revenues	$159.3		$163.7
	Non-interest expenses	75.9		73.6
	Income before income taxes	$83.4		$90.1
	Pre-tax profit margin	52	%	55	%
Market Making	Net revenues	$142.4		$202.3
	Non-interest expenses	76.4		67.7
	Income before income taxes	$66.0		$134.6
	Pre-tax profit margin	46	%	67	%
Corporate*	Net revenues	$2.2		$1.9
	Non-interest expenses	1.9		4.6
	Income before income taxes	$0.3		($2.7	)
Total	Net revenues	$303.9		$367.9
	Non-interest expenses	154.2		145.9
	Income before income taxes	$149.7		$222.0
	Pre-tax profit margin	49	%	60	%

*  Corporate includes corporate related activities as well as inter-segment eliminations.

The following sections discuss results of our operations by business segment, excluding a discussion of corporate income and expense.  In the following tables, revenues and expenses directly associated with each segment are included in determining income before income taxes.  Due to the integrated nature of the business segments, estimates and judgments have been made in allocating certain revenue and expense items.  Transactions between segments generally result from one subsidiary facilitating the business of another subsidiary through the use of its existing trading memberships and clearing arrangements.  In such cases, certain revenue and expense items are eliminated to accurately reflect the external business conducted in each segment.  Rates on transactions between segments are designed to approximate full costs.  In addition to execution and clearing expenses, which are the main cost driver for both the market making segment and the electronic brokerage segment, each segment’s operating expenses include (i) employee compensation and benefits expenses that are incurred directly in support of the businesses, (ii) general and administrative expenses, which include directly incurred expenses for property leases, professional fees, travel and entertainment, communications and information services, equipment, and (iii) indirect support costs (including compensation and other related operating expenses) for administrative services provided by LLC.  Such administrative services include, but are not limited to, computer software development and support, accounting, tax, legal and facilities management.

42

Electronic Brokerage

The following table sets forth the results of our electronic brokerage operations for the indicated periods:

			Three Months
			Ended March 31,
			2012	2011
			(in millions)
Revenues:
	Commissions and execution fees		$100.9	$109.2
	Interest income		51.5	45.2
	Other income		16.1	17.4
		Total revenues	168.5	171.8
	Interest expense		9.2	8.1
		Total net revenues	159.3	163.7
Non-interest expenses:
	Execution and clearing		30.5	35.1
	Employee compensation and benefits		20.7	14.4
	Occupancy, depreciation and amortization		2.9	3.1
	Communications		2.2	2.8
	General and administrative		19.6	18.2
		Total non-interest expenses	75.9	73.6
Income before income taxes			$83.4	$90.1

Three Months Ended March 31, 2012 Compared to the Three Months Ended March 31, 2011

Electronic brokerage total net revenues for the quarter ended March 31, 2012 decreased $4.4 million, or 3%, to $159.3 million, from $163.7 million during the quarter ended March 31, 2011, primarily due to a decrease in commissions and execution fees which was partially offset by an increase in net interest income.  Commissions and execution fees decreased $8.3 million, or 8%, and net interest income increased $5.2 million, or 14%, for the quarter ended March 31, 2012 as compared to the corresponding period in 2011.  This is consistent with our implementation during the second quarter of 2011 of higher risk margin requirements for low value securities, mostly on non-U.S. exchanges.  The increase in net interest income was attributable to an increase of $4.3 million on net fees and interest earned from securities borrowed and loaned transactions and an increase of $1.1 million in net interest from customer cash balances.  The decrease in commissions and execution fees is directly attributable to lower customer trading volume.  Volume in options and futures contracts and stock shares decreased by 12%, 9% and 19%, respectively, for the quarter ended March 31, 2012 from the corresponding period in 2011.  Total DARTs from cleared and execution-only customers for the quarter ended March 31, 2012 increased 1% to approximately 428,000, as compared to approximately 423,000 during the quarter ended March 31, 2011.  DARTs from cleared customers for the quarter ended March 31, 2012 increased 1% to approximately 391,000, as compared to approximately 387,000 during the quarter ended March 31, 2011.  Total customer equity grew by 17% to $28.9 billion at March 31, 2012, from $24.8 billion at March 31, 2011.  The number of customer accounts grew 16% from March 31, 2011 to approximately 195,000 at March 31, 2012.

Electronic brokerage non-interest expenses for the quarter ended March 31, 2012 increased $2.3 million, or 3%, as compared to the quarter ended March 31, 2011.  Within non-interest expenses, execution and clearing expenses decreased by $4.6 million, driven by a decrease in customer trading volume.  Employee compensation and benefits expenses increased by $6.3 million, or 44% during the quarter ended March 31, 2012 as compared to 2011.  The increase in employee compensation and benefits expense was largely a result of a special discretionary grant of restricted stock units awarded on January 6, 2012, as well as a correction to our method for recognizing SIP expenses, as discussed above.  General and administrative expenses increased $1.4 million as administrative and consulting fees increased during the quarter ended March 31, 2012 as compared to 2011.  As a percentage of total net revenues, non-interest expenses increased to 48% from 45% for the quarter ended March 31, 2012 as compared to 2011.

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Market Making

The following table sets forth the results of our market making operations for the indicated periods:

			Three Months
			Ended March 31,
			2012	2011
			(in millions)
Revenues:
	Trading gains		$137.3	$199.4
	Interest income		15.3	13.1
	Other income		0.6	0.7
		Total revenues	153.2	213.2
	Interest expense		10.8	10.9
		Total net revenues	142.4	202.3
Non-interest expenses:
	Execution and clearing		34.7	31.8
	Employee compensation and benefits		20.1	16.4
	Occupancy, depreciation and amortization		2.0	2.5
	Communications		2.5	2.6
	General and administrative		17.1	14.4
		Total non-interest expenses	76.4	67.7
Income before income taxes			$66.0	$134.6

Three Months Ended March 31, 2012 Compared to the Three Months Ended March 31, 2011

Market making total net revenues for the quarter ended March 31, 2012 decreased $59.9 million, or 30%, to $142.4 million, from $202.3 million during the quarter ended March 31, 2011.  Trading gains for the quarter ended March 31, 2012 decreased $62.1 million, or 31%.  As part of managing our overall exposure to foreign currency fluctuations, we maintain our capital in proportion to a basket of currencies we call the GLOBAL.  The decrease in trading gains was driven by an unfavorable swing in currency translation, which contributed 88% of the decrease, reflecting a $0.9 million loss in the first quarter of 2012 as compared to a $54.0 million gain in the corresponding period in 2011.  On a comprehensive basis, our foreign currency strategy yielded a $34.8 million gain this quarter compared to a $72.6 million gain in the corresponding period in 2011.  A discussion of our approach to managing foreign currency exposure is contained in Part I, Item 3 of this Quarterly Report on Form 10-Q entitled “Quantitative and Qualitative Disclosures about Market Risk.”

Trading gains were also negatively impacted by a 2% decrease in average volatility, as measured by the VIX, which decreased to 18.2, for the three months ended March 31, 2012 as compared to the year-ago quarter as well as a 28% decrease in the ratio of actual to implied volatility to 51% for the three months ended March 31, 2012 as compared to the same period last year.  Acting to offset these factors, bid-offer spreads on U.S. exchange-traded options, as reported by the NASDAQ OMX PHLX market, were approximately 12% wider in the first quarter of 2012 than in the corresponding period in 2011.  Market making options contracts volume increased 21% while futures contracts and stock shares volume decreased 18% and 19%, respectively, in the quarter ended March 31, 2012 as compared to the corresponding period in 2011.  The higher options volume was driven by our decision to tighten our bid-offer spreads, which may have increased volume while reducing per contract gains.  The decrease in stock volume in part reflects our actions over the past year to selectively pare down trading in less profitable products.

Net interest income for the quarter ended March 31, 2012 increased by $2.3 million to $4.5 million.  As described above, our trading gains and our net interest income are interchangeable and depend on the mix of market making positions in our portfolio and on relative interest rates in the stock and options markets.  In the quarter ended March 31, 2012, these factors, together with securities lending activity, produced more interest income than in the first quarter of 2011.

Market making non-interest expenses for the quarter ended March 31, 2012 increased $8.7 million, or 13%, as compared to the quarter ended March 31, 2011.  The increase primarily resulted from a $2.9 million increase in execution and clearing fees and a $3.7 million increase in employee compensation and benefits during the quarter ended March 31, 2012 as compared to 2011.  The increase in execution and clearing fees was primarily due to an increase in options volume.  The increase in employee compensation and benefits expense was largely a result of a special discretionary grant of restricted stock units awarded on January 6, 2012, as well as a correction to 

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our method for recognizing SIP expenses, as discussed above.  As a percentage of total net revenues, market making non-interest expenses increased to 54% from 33% for the quarters ended March 31, 2012 and 2011, respectively.

Liquidity and Capital Resources

We maintain a highly liquid balance sheet.  The majority of our assets consist of exchange-listed marketable securities, which are marked-to-market daily, cash and securities segregated for customers, and collateralized receivables arising from customer-related and proprietary securities transactions.  Collateralized receivables consist primarily of securities borrowed, and, to a lesser extent, customer margin loans, receivables from clearing houses for settlement of securities transactions and securities purchased under agreements to resell.  At March 31, 2012, total assets were $32.70 billion of which approximately $32.26 billion, or 98.7%, were considered liquid and consisted predominantly of marketable securities, customers’ cash and collateralized receivables.

We undertake daily monitoring of liquidity needs and available collateral levels to help ensure that we maintain an appropriate liquidity cushion, in the form of unpledged collateral at all times.  Our ability to quickly reduce funding needs by balance sheet contraction without adversely affecting our core businesses and to pledge additional collateral in support of secured borrowings is continuously evaluated to ascertain the adequacy of our capital base.

We actively manage our excess liquidity and we maintain significant borrowing facilities through the securities lending markets and with banks.  As a general practice, we continue to maintain sufficient levels of cash on hand to provide us with a buffer should we need immediately available funds for any reason.

For purposes of providing additional liquidity and further increasing our regulatory capital reserves, we maintain a committed senior secured revolving credit facility from a syndicate of banks and previously issued senior notes (see “Principal Indebtedness” below).  As of March 31, 2012, borrowings under these facilities totaled $30.2 million, which represented less than 1% of our total capitalization.  Liability balances in connection with our short-term borrowings and senior notes payable as of March 31, 2012 were less than their respective average balances during the quarter.  Liability balances in connection with our payables to customers and securities loaned as of March 31, 2012 were higher than their respective average balances during the quarter.

Based on our current level of operations, we believe our cash flows from operations, available cash and available borrowings under our senior secured revolving credit facility will be adequate to meet our future liquidity needs for more than the next twelve months.

Cash and cash equivalents held by the Company’s non-U.S. operating companies at March 31, 2012 were $699 million ($683 million at December 31, 2011). These funds are primarily intended to finance each individual operating company’s local operations, and thus would not be available to fund U.S. domestic operations unless repatriated through payment of dividends to IBG LLC.  It is not currently the Company’s intention to repatriate further amounts from non-U.S. operating companies.  In the event dividends were to be paid to the Company in the future by a non-U.S. operating company, as occurred in connection with the special dividend in December 2010, the Company would be required to accrue and pay income taxes on such dividends to the extent that U.S. income taxes had not been paid previously on the income of the paying company.

Historically, IBG LLC’s consolidated equity has consisted primarily of accumulated retained earnings, which to date have been sufficient to fund our operations and growth. IBG LLC’s consolidated equity increased 10% to $4.97 billion at March 31, 2012 from $4.52 billion at March 31, 2011 as a result of twelve months of comprehensive earnings, partially offset by dividends paid during the last four quarters.

Cash Flows

The following table sets forth our cash flows from operating activities, investing activities and financing activities for the periods indicated:

	Three Months Ended March 31,
	2012	2011
	(in millions)
Cash used in operating activities	$     (53.9)	$     (36.7)
Cash used in investing activities	(10.5)	(35.0)
Cash used in financing activities	(103.1)	(113.3)
Effect of exchange rate changes on cash and cash equivalents	23.4	6.9
Decrease in cash and cash equivalents	$   (144.1)	$   (178.1)

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      Our cash flows from operating activities are largely a reflection of the size and composition of trading positions held by our market making subsidiaries and of the changes in customer cash and margin debit balances in our electronic brokerage business.  Our cash flows from investing activities are primarily related to capitalized internal software development, purchases and sales of memberships at exchanges where we trade and strategic investments in exchanges where such investments will enable us to offer better execution alternatives to our current and prospective customers, or create new opportunities for ourselves as market makers or where we can influence exchanges to provide competing products at better prices using sophisticated technology.  Our cash flows from financing activities are comprised of short-term borrowings, long-term borrowings and capital transactions.  Short-term borrowings from banks are part of our daily cash management in support of operating activities. Other borrowings provide us with flexible sources of excess liquidity and regulatory capital, including a committed two-year $100.0 million senior secured revolving credit facility from a syndicate of banks.  This facility, which expires in May 2012 and for which a replacing facility is being negotiated, was entered into in May 2010.  Capital transactions consist primarily of quarterly cash dividends paid to stockholders, which commenced during the second quarter of 2011 and cash distributions paid to IBGH.

Three Months Ended March 31, 2012:   Our cash and cash equivalents decreased by $144.1 million to $1,551.4 million for the three months ended March 31, 2012.  We used $53.9 million from net cash in operating activities.  We used net cash of $113.6 million in our investing and financing activities primarily due to a decrease in senior notes outstanding and dividends paid to IBG Holdings LLC and to common stockholders.

Three Months Ended March 31, 2011: Our cash and cash equivalents decreased by $178.1 million to $1,176.2 million for the three months ended March 31, 2011. We used $36.7 million in net cash in operating activities. We used net cash of $148.3 million in our investing and financing activities primarily due to the repayment of borrowings under our senior secured revolving credit facility.

Regulatory Capital Requirements

Our principal operating subsidiaries are subject to separate regulation and capital requirements in the United States and other jurisdictions.  Timber Hill LLC and Interactive Brokers LLC are registered U.S. broker-dealers and futures commission merchants, and their primary regulators include the SEC, the Commodity Futures Trading Commission, the Chicago Board Options Exchange, the Chicago Mercantile Exchange, the Financial Industry Regulatory Authority and the National Futures Association.  Timber Hill Europe AG is registered to do business in Switzerland as a securities dealer and is regulated by the Swiss Financial Market Supervisory Authority.  Interactive Brokers (U.K.) Limited is subject to regulation by the U.K. Financial Services Authority.  Our various other operating subsidiaries are similarly regulated.

At March 31, 2012, aggregate excess regulatory capital for all of the Operating Companies was $2.71 billion. The following table summarizes capital, capital requirements and excess regulatory capital (millions):

		Net Capital/ Eligible Equity		Requirement		Excess
IB LLC	$	1,420	$	197	$	1,223
TH LLC		737		41		696
THE		622		224		398
Other regulated Operating Companies		418		21		397
	$	3,197	$	483	$	2,714

At March 31, 2012, all of the operating companies were in compliance with their respective regulatory capital requirements.

For additional information regarding our net capital requirements see note 14 to the unaudited condensed consolidated financial statements in Part I , Item 1 of this Quarterly Report on Form 10-Q.

Principal Indebtedness

IBG LLC is the borrower under a $100.0 million senior secured revolving credit facility, which had no balance outstanding as of March 31, 2012, and is the issuer of senior notes, of which $30.2 million were outstanding as of March 31, 2012.

Senior Secured Revolving Credit Facility

On May 18, 2010, IBG LLC entered into a $100 million two-year senior secured revolving credit facility with a syndicate of banks.  IBG LLC is the sole borrower under this credit facility, which is required to be guaranteed by IBG LLC’s domestic non-regulated subsidiaries (currently there are no such entities).  The facility’s interest rate is indexed to the LIBOR rate for the relevant term, at the borrower’s option, and is secured by a first priority interest in all of the capital stock of each entity owned directly by

46

IBG LLC (subject to customary limitations with respect to foreign subsidiaries).  The facility may be used to finance working capital needs and general corporate purposes.  The financial covenants contained in this credit facility are as follows:

· minimum consolidated shareholders’ equity, as defined, of $3.6 billion, with quarterly increases equal to 25% of positive consolidated income;

·      maximum total debt to capitalization ratio of 30%;

·      minimum liquidity ratio of 1.0 to 1.0; and

·      maximum total debt to net regulatory capital ratio of 35%.

At March 31, 2012, IBG LLC was in compliance with all of the covenants of this credit facility.  At maturity, subject to meeting certain terms of the facility, the Company will have an option to convert the facility to a one-year term loan.

Senior Notes

Based on a review of its available liquidity resources, which resulted in a determination of a strong liquidity position, in January 2012, the Company decided to discontinue the Senior Notes Program.  It is the Company’s intention that no new Senior Notes will be issued and all Senior Notes outstanding as of March 31, 2012 will be redeemed by June 2012.

Prior to January 2012, IBG LLC periodically issued senior notes in private placements to certain qualified customers of IB LLC.  IBG LLC used the proceeds from sales of the senior notes to provide capital to IBG LLC’s broker-dealer subsidiaries in the form of subordinated loans and for other general purposes.  The outstanding senior notes have a 3% per annum interest rate and an 18-month maturity.  IBG LLC may, solely at its option, redeem the senior notes at any time on or after a specified date in the third month or the sixth month, respectively, after the date on which the senior notes are issued and sold, at a redemption price equal to 100% of the principal amount of the senior notes to be redeemed plus accrued interest.

Total senior notes outstanding at March 31, 2012 were $30.2 million and senior notes outstanding at December 31, 2011 were $101.4 million, all being 3% notes.  During the period from January 1 through March 31, 2012, no senior notes were issued, and $71.2 million senior notes were redeemed.

The senior notes are secured, as is the senior secured revolving credit facility, by a first priority interest in all of the capital stock of each entity owned directly by IBG LLC (subject to customary limitations with respect to foreign subsidiaries).  The senior notes contain covenants that may limit IBG LLC’s ability to:

· incur, or permit its subsidiaries to incur, additional indebtedness;

· create, or permit its subsidiaries to create, liens on any capital stock or equity interests of its subsidiaries;

· declare and pay dividends or make other equity distributions; and

· consolidate, merge or sell all or substantially all of its assets.

Capital Expenditures

Our capital expenditures are comprised of compensation costs of our software engineering staff for development of software for internal use and expenditures for computer, networking and communications hardware.  These expenditure items are reported as property and equipment.  Capital expenditures for property and equipment were approximately $5.2 million and $3.2 million for the three months ended March 31, 2012 and 2011, respectively.  We anticipate that our 2012 gross capital expenditures will be level to prior years, including ongoing costs related to the expanding and upgrading our data centers and backup facilities.  We expect our future capital expenditures to rise as we continue our focus on technology infrastructure initiatives to further enhance our competitive position.  We anticipate that we will fund capital expenditures with cash from operations and cash on hand.  In response to changing economic conditions, we believe we have the flexibility to modify our capital expenditures by adjusting them (either upward or downward) to match our actual performance.  If we pursue any strategic acquisitions, we may incur additional capital expenditures.

Seasonality

Our businesses are subject to seasonal fluctuations, reflecting varying numbers of market participants at times during the year and varying numbers of trading days from quarter-to-quarter, including declines in trading activity due to holidays.  Typical seasonal trends may be superseded by market or world events, which can have a significant impact on prices and trading volume.

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Inflation

Although we cannot accurately anticipate the effect of inflation on our operations, we believe that inflation has not had for the three most recent years, and is not likely in the foreseeable future to have, a material impact on our results of operations.

Strategic Investments and Acquisitions

We periodically engage in evaluations of potential strategic investments and acquisitions.  The Company holds strategic investments in electronic trading exchanges including: Boston Options Exchange, LLC; OneChicago LLC and CBOE Stock Exchange, LLC.  The Company has also made investments in Quadriserv Inc., an electronic securities lending platform provider and Factor Advisors, LLC, an Exchange Traded Funds (“ETF”) issuer.

We intend to continue making acquisitions on an opportunistic basis, generally only when the acquisition candidate will, in our opinion, enable us to acquire either technology or customers faster than we could develop them on our own.  At March 31, 2012, there were no definitive agreements with respect to any material acquisition.

Certain Information Concerning Off-Balance-Sheet Arrangements

IBG, Inc. may be exposed to a risk of loss not reflected in the unaudited condensed consolidated financial statements for futures products, which represent obligations of the Company to settle at contracted prices, which may require repurchase or sale in the market at prevailing prices.  Accordingly, these transactions result in off-balance sheet risk as IBG, Inc.’s cost to liquidate such futures contracts may exceed the amounts reported in our unaudited condensed consolidated statements of financial condition.

Critical Accounting Policies

Valuation of Financial Instruments

Due to the nature of our operations, substantially all of our financial instrument assets, comprised of securities owned, securities purchased under agreements to resell, securities borrowed and receivables from brokers, dealers and clearing organizations are carried at fair value based on published market prices and are marked to market daily, or are assets which are short-term in nature (such as U. S. government treasury bills or spot foreign exchange) and are reflected at amounts approximating fair value.  Similarly, all of our financial instrument liabilities that arise from securities sold but not yet purchased, securities sold under agreements to repurchase, securities loaned and payables to brokers, dealers and clearing organizations are short-term in nature and are reported at quoted market prices or at amounts approximating fair value.  Our long and short positions are valued at either the last consolidated trade price or the last consolidated bid/offer mid-point (where applicable) at the close of regular trading hours, in their respective markets.  Given that we manage a globally integrated market making portfolio, we have large and substantially offsetting positions in securities and commodities that trade on different exchanges that close at different times of the trading day.  As a result, there may be large and anomalous swings in the value of our positions daily and, accordingly, in our earnings in any period.  This is especially true on the last business day of each calendar quarter, although such swings tend to come back into equilibrium on the first business day of the succeeding calendar quarter.

Principles of Consolidation, including Noncontrolling Interests

The consolidated financial statements include the accounts of IBG, Inc. and its majority and wholly owned subsidiaries. As sole managing member of IBG LLC, IBG, Inc. exerts control over the Group’s operations. In accordance with ASC 810, Consolidation, the Company consolidates the Group’s consolidated financial statements and records as noncontrolling interest the interests in the Group that IBG, Inc. does not own.

We are the sole managing member of IBG LLC and, as such, operate and control all of the business and affairs of IBG LLC and its subsidiaries and consolidate IBG LLC’s financial results into our financial statements. We hold approximately 11.5% ownership interest in IBG LLC. IBG Holdings LLC is owned by the original members of IBG LLC and holds approximately 88.5% ownership interest in IBG LLC. Our share of IBG LLC’s net income, excluding IBG Holdings LLC’ noncontrolling interest, is approximately 11.5% and similarly, outstanding shares of our common stock represent approximately 11.5% of the outstanding membership interests of IBG LLC.

Prior to the June 6, 2012 amendment to the Exchange Agreement (Note 4), the Company was required to report IBG Holdings LLC’ ownership as redeemable noncontrolling interests (i.e., temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (formerly FASB Emerging Issues Task Force Topic D-98), outside of total equity (Note 21) in the consolidated financial statements.  Redemption value of these redeemable noncontrolling interests is measured as the number of equivalent shares of member interests in IBG LLC owned by IBG Holdings LLC multiplied by the then current market price per share of the Company’s common stock.  The excess of the redemption value over the book value of these interests, which does not affect net

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income attributable to common stockholders or cash flows, is required to be accounted for as a reduction of the Company’s stockholders’ equity in the consolidated statement of financial condition.

The Company has elected to recognize changes in redemption value in each reporting period immediately as they occur as if the end of each reporting period was also the redemption date for the entire redeemable noncontrolling interest under paragraph 15(b) of ASC 480-10-S99-3A, notwithstanding that the redeemable noncontrolling interests are redeemable over a period of time pursuant to a redemption schedule (Note 4).

For periods after the Amendment, the noncontrolling interests in IBG LLC attributable to IBG Holdings LLC will be reported as a component of permanent equity.

Earnings per share

The Company has determined to reflect Topic D-98 measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common shareholders.  Furthermore, in accordance with footnote 17 of ASC 480-10-S99-3A, the Company has elected to treat only the portion of the periodic measurement adjustments that reflect a redemption in excess of fair value as being akin to a dividend, reducing net income available for common stockholders for purposes of applying the two-class method.  Decreases in the carrying amount of redeemable noncontrolling interests through Topic D-98 measurement adjustments are reflected in the application of the two-class method only to the extent they represent recoveries of amounts previously accounted for by applying the two-class method.

Stock-Based Compensation

IBG, Inc. follows ASC 718, Compensation—Stock Compensation, to account for its stock-based compensation plans. ASC 718 requires all share-based payments to employees to be recognized in the financial statements using a fair value-based method. As a result, IBG, Inc. expenses the fair value of stock granted to employees, generally 50% in the year of grant in recognition of plan forfeiture provisions (described below) and the remaining 50% over the related vesting period utilizing the “graded vesting” method permitted under ASC 718-10.  In the case of “retirement eligible” employees (those employees older than 59), 100% of share awards are expensed when granted.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company. The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.

Contingencies

Our policy is to estimate and accrue for potential losses that may arise out of litigation and regulatory proceedings, to the extent that such losses are probable and can be estimated, in accordance with ASC 450, Contingencies.  Potential losses that might arise out of tax audits, to the extent that such losses are “more likely than not,” would be estimated and accrued in accordance with ASC 740-10.  Significant judgment is required in making these estimates and our final liabilities may ultimately be materially different.  Our total liability accrued with respect to litigation and regulatory proceedings is determined on a case-by-case basis and represents an estimate of probable losses based on, among other factors, the progress of each case, our experience with and industry experience with similar cases and the opinions and views of internal and external legal counsel.  Given the inherent difficulty of predicting the outcome of our litigation and regulatory matters, particularly in cases or proceedings in which substantial or indeterminate damages or fines are sought, or where cases or proceedings are in the early stages, we cannot estimate losses or ranges of losses for cases or proceedings where there is only a reasonable possibility that a loss may be incurred.

We have been from time to time subject to certain pending and legal actions which arise out of the normal course of business.  Litigation is inherently unpredictable, particularly in proceedings where claimants seek substantial or indeterminate damages, or which are in their early stages.  We cannot predict with certainty the actual loss or range of loss related to such legal proceedings, the manner in which they will be resolved, the timing of final resolution or the ultimate settlement.  Consequently, we cannot estimate losses or ranges of losses related to such legal matters, even in instances where it is reasonably possible that a future loss will be incurred.  As of March 31, 2012, we, along with certain of our subsidiaries, have been named parties to legal actions, which we and/or such subsidiaries intend to defend vigorously.  Although the results of legal actions cannot be predicted with certainty, it is the opinion of management that the resolution of these actions is not expected to have a material adverse effect, if any, on our business or financial condition, but may have a material impact on the results of operations for a given period.  As of March 31, 2012 and December 31, 2011, reserves provided for potential losses related to litigation matters were not material.

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Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in the unaudited condensed consolidated financial statements and accompanying notes.  Estimates, by their nature, are based on judgment and available information.  Therefore, actual results could differ materially from those estimates.  Such estimates include the estimated fair values of IBG LLC and the Company in connection with accounting for redeemable noncontrolling interests, value of investments accounted for under the equity method of accounting, the estimated useful lives of property and equipment, including capitalized internally developed software, the allowance for doubtful accounts, compensation accruals, tax liabilities and estimated contingency reserves.

Income Taxes

IBG, Inc. accounts for income taxes in accordance with ASC 740, Income Taxes.   The Company’s income tax expense, deferred tax assets and liabilities, and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid. We are subject to income taxes in both the United States and numerous foreign jurisdictions. Determining unaudited condensed consolidated income tax expense requires significant judgments and estimates.

Deferred income tax assets and liabilities arise from temporary differences between the tax and financial statement recognition of the underlying assets and liabilities. In evaluating our ability to recover our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results adjusted for the results of discontinued operations and changes in accounting policies and incorporate assumptions including the amount of future state, federal and foreign pretax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax-planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider three years of cumulative operating income (loss).

The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in a multitude of jurisdictions across our global operations. Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future. Management is not aware of any such changes that would have a material effect on the Company’s results of operations, cash flows, or financial position.

ASC 740 provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits. ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.

The Company records tax liabilities in accordance with ASC 740 and adjusts these liabilities when management’s judgment changes as a result of the evaluation of new information not previously available. Because of the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities. These differences will be reflected as increases or decreases to income tax expense in the period in which new information is available.

Recent Accounting Pronouncements

Subsequent to the adoption of the ASC, the FASB will issue Accounting Standards Updates (“ASUs”) as the means to add to or delete from, or otherwise amend the ASC.  In 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, no ASUs have been issued.  Following is a summary of recently issued ASUs that may affect the Company’s unaudited condensed consolidated financial statements:

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	Affects	Status
ASU 2011-03	Transfers and Servicing (Topic 860):Reconsideration of Effective Control for Repurchase Agreements	Fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011.  Early application is not permitted.
ASU 2011-04	Fair Value Measurement (Topic 820):Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS	To be applied prospectively for interim and annual periods beginning after December 15, 2011.  Early adoption is not permitted for public entities.
ASU 2011-08	Intangibles - Goodwill and Other (Topic 350):Testing Goodwill for Impairment	Effective for fiscal years beginning after December 15, 2011.  Early adoption is permitted.
ASU 2011-11	Balance Sheet (Topic 210):Disclosures about Offsetting Assets and Liabilities	Effective for fiscal periods beginning on or after January 1, 2013.  Retrospective disclosures for comparative periods presented will be required.

 

Adoption of those ASUs that became effective during 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, did not have a material effect on those financial statements.  Management is assessing the potential impact on the Company’s financial statements of adopting ASUs that will become effective in the future.

ASC/IFRS Convergence

In February 2010, the SEC issued Commission Statement in Support of Convergence and Global Accounting Standards, a formal statement updating the status of its November 2008 Roadmap for the Potential Use of Financial Statements Prepared in Accordance with International Financial Reporting Standards by U.S. Issuers (“IFRS Roadmap”). The statement supported convergence of accounting standards and the development of a single set of global accounting standards. As directed in this statement, the SEC staff issued Work Plan for the Consideration of Incorporating International Financial Reporting Standards into the Financial Reporting System for U.S. Issuers (the “Work Plan”) in May 2010, and issued a follow-up Staff Paper, subtitled Exploring a Possible Method of Incorporation in May 2011. The Work Plan outlines the steps to be taken to provide the SEC with information to be able to conclude whether IFRS should be adopted for U.S. registrants and the Staff Paper discusses alternative approaches (“Convergence” and “Endorsement”) to adoption that could be applied. Within the Staff Paper, the SEC Staff has issued a Request for Comment on these alternatives. The Comment period ended July 31, 2011 and the SEC Staff issued two Staff Papers, A Comparison of U.S. GAAP and IFRS and Analysis of IFRS in Practice on November 16, 2011.

The SEC and U.S. accounting standard setters continue to publicly support a uniform set of global accounting standards, the adoption of IFRS for U.S. registrants and private companies, but the extent and timing of adoption remain uncertain. The aforementioned Work Plan and other SEC published documents have not committed U.S. registrants to adoption or timing of adoption of IFRS. The initial adoption for U.S. registrants could be as early as December 31, 2015 or 2016, with a transition date of either January 1, 2013 or 2014 for the initial three year retrospective comparative reporting period. Management applies versions of IFRS for the stand alone financial statements of several of the Operating Companies, where required, and continues to assess the potential impact of adopting IFRS on the Company’s unaudited condensed consolidated financial statements.

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to various market risks.  Our exposures to market risks arise from assumptions built into our pricing models, equity price risk, foreign currency exchange rate fluctuations related to our international operations, changes in interest rates which impact our variable-rate debt obligations, and risks relating to the extension of margin credit to our customers.

Pricing Model Exposure

Our strategy as a market maker is to calculate quotes a few seconds ahead of the market and execute small trades at tiny but favorable differentials as a result.  Our proprietary pricing model continuously evaluates and monitors the risks inherent in our portfolio, assimilates market data and reevaluates the outstanding quotes in our entire portfolio each second.  Certain aspects of the model rely on historical prices of securities.  If the behavior of price movements of individual securities diverges substantially from what their historical behavior would predict, we might incur trading losses.  We attempt to limit such risks by diversifying our portfolio across many different options, futures and underlying securities and avoiding concentrations of positions based on the same underlying security.  Historically, our losses from these events have been immaterial in comparison to our annual trading profits.

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Foreign Currency Exposure

As a result of our international market making activities and accumulated earnings in our foreign subsidiaries, our income and net worth is exposed to fluctuations in foreign exchange rates.  Our European operations and some of our Asian operations are conducted by our Swiss subsidiary, THE.  THE is regulated by the Swiss Financial Market Supervisory Authority as a securities dealer and its financial statements are presented in Swiss francs.  Accordingly, THE is exposed to certain foreign exchange risks as described below:

· THE buys and sells futures contracts and securities denominated in various currencies and carries bank balances and borrows and lends such currencies in its regular course of business.  At the end of each accounting period THE’s assets and liabilities are translated into Swiss francs for presentation in its financial statements.  The resulting gains or losses are reported as translation gain or loss in THE’s income statement.  When we prepare our unaudited condensed consolidated financial statements, THE’s Swiss franc balances are translated into U.S. dollars for U.S. GAAP purposes.  THE’s translation gains or losses appear as such on IBG, Inc.’s unaudited condensed consolidated statement of comprehensive income, included in trading gains.

· THE’s net worth is carried on THE’s books in Swiss francs in accordance with Swiss accounting standards.  At the end of each accounting period, THE’s net worth is translated at the then prevailing exchange rate into U.S. dollars and the resulting gain or loss is reported as Other Comprehensive Income, (“OCI”) in our unaudited condensed consolidated statement of financial condition and unaudited condensed consolidated statement of comprehensive income.  To a smaller extent, OCI is also produced by our other non-U.S. subsidiaries.

Historically, we have taken the approach of not hedging the above exposures, based on the notion that the cost of constantly hedging over the years would amount to more than the random impact of rate changes on our non-U.S. dollar balances.  For instance, an increase in the value of the Swiss franc would be unfavorable to the earnings of THE but would be counterbalanced to some extent by the fact that the yearly translation gain or loss into U.S. dollars is likely to move in the opposite direction.

Since 2005, we have expanded our market making systems to incorporate cash forex and forex options to hedge IBG LLC's currency exposure at little or no cost and to hedge our currency exposure throughout the day on a continuous basis.  In connection with the development of our currency hedging strategy, we determined to base our net worth in GLOBALs, a basket of currencies. On October 3, 2011 we announced that we expanded the composition of the GLOBAL from six to 16 currencies. The table below displays the component changes in detail. U.S. dollar (“USD”) amounts are calculated using exchange rates at September 30, 2011, the effective date for the change.

GLOBAL					NEW			CHANGE
	9/30/2011	GLOBAL	GLOBAL in	% of	GLOBAL	GLOBAL in	% of	% of
Currency	FX Rates	Composition	USD Equiv.	Comp.	Composition	USD Equiv.	Comp.	Comp.
USD	1.0000	0.55	0.550	49.3%	0.41	0.410	36.8%	-12.5%
EUR	1.3400	0.24	0.322	28.8%	0.17	0.228	20.4%	-8.4%
GBP	1.5594	0.03	0.047	4.2%	0.03	0.047	4.2%	0.0%
JPY	0.0130	10.00	0.130	11.6%	10.00	0.130	11.6%	0.0%
AUD	0.9674	0.03	0.029	2.6%	0.03	0.029	2.6%	0.0%
CAD	0.9545	0.04	0.038	3.4%	0.04	0.038	3.4%	0.0%
CHF	1.1034				0.03	0.033	3.0%	3.0%
HKD	0.1284				0.26	0.033	3.0%	3.0%
SEK	0.1457				0.09	0.013	1.2%	1.2%
MXN	0.0721				0.30	0.022	1.9%	1.9%
DKK	0.1801				0.04	0.007	0.6%	0.6%
NOK	0.1704				0.06	0.010	0.9%	0.9%
KRW	0.0008				28.00	0.024	2.1%	2.1%
BRL	0.5317				0.08	0.043	3.8%	3.8%
INR	0.0204				2.00	0.041	3.7%	3.7%
SGD	0.7646				0.01	0.008	0.7%	0.7%
Total GLOBALS, as measured in USD			$ 1.115	100.0%		$ 1.115	100.0%	0.0%

Because we actively manage our global currency exposure by maintaining our equity in GLOBALs, we consider ourselves a global enterprise based in a diversified basket of currencies rather than a U.S. dollar based company.  At March 31, 2012 approximately 63% of our equity was denominated in currencies other than U.S. dollars.

The effects of our currency strategy appear in two places in the financial statements: (1) as a component of Trading Gains in the unaudited condensed consolidated statement of comprehensive income and (2) as Other Comprehensive Income in the unaudited condensed consolidated statement of financial condition.  The full effect of the GLOBAL is captured in Comprehensive Income.

52

Reported results on a comprehensive basis reflect the GAAP convention adopted in 2011 that requires the reporting of currency translation results contained in Other Comprehensive Income as part of reportable earnings. Previously, currency translation results were reported only as a component of changes in Total Equity in the unaudited condensed consolidated statement of financial condition.

Interest Rate Risk

Under our senior secured revolving credit facility, we have the ability to choose borrowing tenors from overnight to twelve months, which permits us to minimize the risk of interest rate fluctuations.  We have no borrowings outstanding under this facility as of March 31, 2012.

We pay our electronic brokerage customers interest based on benchmark overnight interest rates in various currencies.  In a higher interest rate environment, exhibiting a positive yield curve, we typically invest a portion of these funds in U.S. government treasury securities with maturities of up to three months.  Under these circumstances, if interest rates were to increase rapidly and substantially, in increments that were not reflected in the yields on these treasury securities, our net interest income from customer deposits would decrease.  Based upon investments outstanding at March 31, 2012, we had minimal exposure of this nature.

We also face the potential for reduced net interest income from customer deposits due to interest rate spread compression in a low rate environment.  Due to a currently low rate environment, a decrease of the U.S. benchmark interest rates to zero, or roughly 0.09%, would reduce our net interest income by approximately $1.5 million on an annualized basis.

We also face substantial interest rate risk due to positions carried in our market making business to the extent that long or short stock positions may have been established for future or forward dates on options or futures contracts and the value of such positions are impacted by interest rates.  We hedge such risks by entering into interest rate futures contracts.  To the extent that these futures positions do not perfectly hedge this interest rate risk, our trading gains may be adversely affected.  The amount of such risk cannot be quantified.

Dividend Risk

We face dividend risk in our market making business as we derive significant revenues and incur significant expenses in the form of dividend income and expense, respectively, from our substantial inventory of equity securities, and must make significant payments in lieu of dividends on short positions in securities in our portfolio.  Projected future dividends are an important component of pricing equity options and other derivatives, and incorrect projections may lead to trading losses.  The amount of these risks cannot be quantified.

Margin Credit

We extend margin credit to our customers, which is subject to various regulatory requirements.  Margin credit is collateralized by cash and securities in the customers’ accounts.  The risks associated with margin credit increase during periods of fast market movements or in cases where collateral is concentrated and market movements occur.  During such times, customers who utilize margin credit and who have collateralized their obligations with securities may find that the securities have a rapidly depreciating value and may not be sufficient to cover their obligations in the event of a liquidation.  We are also exposed to credit risk when our customers execute transactions, such as short sales of options and equities that can expose them to risk beyond their invested capital.

We expect this kind of exposure to increase with growth in our overall business.  Because we indemnify and hold harmless our clearing firms from certain liabilities or claims, the use of margin credit and short sales may expose us to significant off-balance-sheet risk in the event that collateral requirements are not sufficient to fully cover losses that customers may incur and those customers fail to satisfy their obligations.  As of March 31, 2012, we had $8.46 billion in margin credit extended to our customers.  The amount of risk to which we are exposed from the margin credit we extend to our customers and from short sale transactions by our customers is unlimited and not quantifiable as the risk is dependent upon analysis of a potential significant and undeterminable rise or fall in stock prices.  Our account level margin credit requirements meet or exceed those required by Regulation T of the Board of Governors of the Federal Reserve or the SEC portfolio margining regulations, as appropriate.  As a matter of practice, we enforce real-time margin compliance monitoring and liquidate customers’ positions if their equity falls below required margin requirements.

We have a comprehensive policy implemented in accordance with regulatory standards to assess and monitor the suitability of investors to engage in various trading activities.  To mitigate our risk, we also continuously monitor customer accounts to detect excessive concentration, large orders or positions, patterns of day trading and other activities that indicate increased risk to us.

Our credit exposure is to a great extent mitigated by our policy of automatically evaluating each account throughout the trading day and closing out positions automatically for accounts that are found to be under-margined.  While this methodology is effective in most situations, it may not be effective in situations where no liquid market exists for the relevant securities or commodities or where, for any reason, automatic liquidation for certain accounts has been disabled.

53

ITEM 4.  CONTROLS AND PROCEDURES

Restatement of Prior Period Financial Statements Filed

In May 2012, in connection with the review of the Company’s Quarterly Report of Form 10-Q for the quarter ended March 31, 2012, Deloitte & Touche LLP, the Company’s independent registered public accounting firm questioned the Company’s interpretation and application of accounting guidance (contained in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC or the “Codification”) 480-10-S99, formerly FASB Emerging Issues Task Force Topic D-98) to cash redemption provisions regarding redeemable noncontrolling interests.  After reassessing its interpretation and application of this accounting guidance, including obtaining an interpretation from the Office of the Chief Accountant of the Securities and Exchange Commission (“SEC”), the Company concluded that its interpretation of this accounting guidance and its application of that guidance to these cash redemption provisions was incorrect, resulting in an error in its consolidated financial statements.  This error had no effect on reported net income attributable to common stockholders or cash flows, but did affect the classification of redeemable noncontrolling interests in IBG LLC (“LLC”) attributable to IBG Holdings LLC (“Holdings”) from the Company’s May 3, 2007 initial public offering through June 6, 2012, as more fully described in Note 21 to the consolidated financial statements contained in Part 2, Item 8 of the Company’s Amended Annual Report on Form 10-K/A and Note 17 of this Amended Quarterly Report.  As a result of this change in the classification of redeemable noncontrolling interests, the calculation of earnings per share was affected.

In addition to the change in classification relating to the reporting of redeemable noncontrolling interests attributable to Holdings described above, the Company has corrected other errors that had been previously identified that affected previously issued financial statements.  These items included errors in recording share issuances under stock compensation award plans, which was corrected in connection with the preparation of the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2012 and adjustments to record the timely recognition of the effect of equity award plan forfeiture provisions, which error was corrected in the Company’s originally filed 2011 Annual Report on Form 10-K.  Both of these corrections were disclosed as immaterial restatements in the respective original filings.

On August 13, 2012, the Audit Committee of the Board of Directors of the Company and management concluded that the previously issued consolidated financial statements for the three years ended December 31, 2011 and for the quarter ended March 31, 2012 should no longer be relied upon and should be restated.

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of the Company's Chief Executive Officer (“CEO”) and the Chief Financial Officer (“CFO”), management evaluated the effectiveness of the design and operation of the Company's disclosure controls and procedures pursuant to Exchange Act Rule 13a-15, as of March 31, 2012, in conjunction with the preparation of our Quarterly Report on Form 10-Q for the quarter ended March 31, 2012. Based on that evaluation, prior to the restatement of prior period financial statements referred to in the preceding paragraph, the CEO and CFO concluded that the Company's disclosure controls and procedures were effective to ensure that information required to be disclosed in the Company's periodic SEC filings is processed, recorded, summarized and reported within the time periods specified in the SEC's rules and forms.

Notwithstanding management’s conclusion regarding internal control over financial reporting as of March 31, 2012, as reported in Part II, Item 9 of the Company’s Amended Annual Report on Form 10-K/A and Part I, Item 4 of the Company’s Amended Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2012, management re-evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of those dates and concluded that, because of a material weakness in our internal controls over financial reporting related to the review and interpretation of complex accounting issues - specifically, redeemable noncontrolling interests and stock based compensation - (as discussed below), the Company's disclosure controls and procedures surrounding the Company's redeemable noncontrolling interests were not effective as of December 31, 2011 or March 31, 2012. Notwithstanding the material weakness described below, management has concluded that the unaudited condensed consolidated financial statements included in this Amended Quarterly Report on Form 10-Q/A present fairly, in all material respects, the Company's financial position, results of operations and cash flows for the periods presented in conformity with accounting principles generally accepted in the United States.

54

Management's Assessment of Internal Control Over Financial Reporting (as revised)

The Company's management is responsible for establishing and maintaining adequate internal control over financial reporting. The Company's internal control over financial reporting is a process designed under the supervision of the Company's CEO and CFO to provide reasonable assurance regarding reliability of financial reporting and preparation of the Company's financial statements for external reporting purposes in accordance with U.S. GAAP.

In connection with the original filing of the Company’s Annual report on Form 10-K in February 2012, we included a Management’s Annual Report on Internal Control over Financial Reporting therein, which expressed a conclusion that management believed that our internal control over financial reporting was effective as of December 31, 2011. In connection with filing its amended Form 10-K/A for the year ended December 31, 2011, management, including our CEO and CFO reassessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2011. In making this reassessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control-Integrated Framework. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a timely basis. Based on management’s reassessment, management has concluded that the Company’s internal control over financial reporting related to the review and interpretation of complex accounting issues, specifically the Company’s accounting for redeemable noncontrolling interests and stock based compensation, was not effective as of December 31, 2011 and March 31, 2012 due to the fact that there was a material weakness in its internal control over financial reporting. The material weakness in internal control over financial reporting is comprised of the following:

·   Accounting for cash redemption provisions for redeemable noncontrolling interests in LLC attributable to Holdings under ASC 480-10-S99, Distinguishing Liabilities from Equity, SEC Materials - The controls over the review and interpretation of this accounting guidance as it applies to cash redemption provisions applicable to noncontrolling interests in LLC attributable to Holdings were improperly designed and were not effective in assessing the effects of control relationships and their overriding effect on the cash redemption contractual terms contained in the Exchange Agreement prior to its amendment on June 6, 2012.

·   Share based payment award plans under ASC 718-10, Compensation – Stock Compensation – The controls over the review and interpretation of the accounting and financial reporting for the 2007 Stock Incentive Plan for the recording of share issuances made under stock compensation awards and for the Plan’s forfeiture provisions were improperly designed and were not effective to ensure that compensation expense was reported as a direct credit to the Company’s stockholders’ equity (deficit) as incurred or for accounting for the full effect of forfeiture provisions at the time share grants are awarded.

The effectiveness of the Company's internal control over financial reporting as of December 31, 2011, has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their report which appears in our Amended Annual Report on Form 10-K/A filed with the SEC on August 31, 2012.

Changes to Internal Control Over Financial Reporting

There have not been any changes in our internal control over financial reporting other than those described above for the quarter ended March 31, 2012 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Remediation Plan

Management has been actively engaged in developing remediation plans to address the above material weakness. The remediation efforts include, but are not limited to, the following:

Actions taken regarding current restatement issues

·   Implemented a comprehensive review of the Company’s accounting for noncontrolling interests and stock compensation.

·   Reviewed and amended the Exchange Agreement on June 6, 2012 eliminating the cash redemption option.

55

·   Requested and received an Interpretation of this accounting issue from the Office of the Chief Accountant of the SEC to clarify the requirements under this accounting guidance.

Remediation plan

·   Enhanced the existing policy requiring a quarterly review by the CFO and Chief Accounting Officer (“CAO”) of significant transactions and recently issued official accounting guidance.  As part of that review, the CFO and CAO will assess the possible effects of such transactions and accounting guidance on the Company’s financial statements.

·   The results of this assessment will be reviewed quarterly with the Company’s Audit Committee and, where the assessments indicate that further research and evaluation are required, the CFO and the CAO will recommend to the Audit Committee whether they believe the Company has sufficient professional resources to address the issues internally or if external professional resources are required.

·   Established a policy requiring consideration of consultation with accounting policy or other subject matter experts, not affiliated with the Company’s independent accountants, on future complex accounting interpretations should they arise from the above assessments.

·   When further research and evaluation of accounting policy issues is undertaken, whether conducted internally or through external consultation with accounting policy or other experts, the results of such research and evaluation will be reported to the Company’s Audit Committee.

In addition, under the direction of the Audit Committee, management will continue to review and make necessary changes to the overall design of the Company’s internal control environment, as well as to policies and procedures to improve the overall effectiveness of internal control over financial reporting.

If not remediated, these control deficiencies could result in further material misstatements to the Company’s financial statements.

56

PART II OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

There have been no material changes to the legal proceedings disclosed under Part 1, Item 3 of our Amended Annual Report on Form 10-K/A filed with the SEC on August 31, 2012.  During our normal course of business, the Company’s regulated operating companies are in discussions with regulators about matters raised during regulatory examinations or otherwise subject to their inquiry.  These matters could result in censures, fines or other sanctions.  Management believes the outcome of any resulting actions will not be material to the Company’s financial condition, results of operations or cash flows.  However, the Company is unable to predict the outcome of these matters.

The Company believes, based on current knowledge and after consultation with counsel, that the outcome of the pending matters will not have a material adverse effect on the unaudited condensed consolidated financial condition of the Company.  Legal reserves have been established in accordance with ASC 450, Contingencies.  The ultimate resolution may differ from the amounts reserved.

ITEM 1A.  RISK FACTORS

There have been no material changes to the risk factors disclosed in under Part 1, Item 1A of our Amended Annual Report on Form 10-K/A filed with the SEC on August 31, 2012, except as listed below.

Risks Related to our Previously Unreviewed Financial Statements:

Our failure to obtain the review required by Regulation S−X and the resulting status of our Form 10−Q for the quarter ended March 31, 2012 as not having been filed on a timely basis, rendered us ineligible to file registration statements on Form S−3, to use our existing shelf registration statement on Form S−3 or our registration statement on Form S−8, and may have other adverse consequences, such as potential material impacts on covenants contained in our contractual commitments, our obligations under NASDAQ Stock Market listing standards, and compliance with applicable securities laws.

ITEM 2.  UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None

ITEM 3.  DEFAULTS UPON SENIOR SECURITIES

None

ITEM 5.  OTHER INFORMATION

None

57

ITEM 6.  EXHIBITS

Exhibit
Number	Description
10.1	Amended and Restated Operating Agreement of IBG LLC (filed as Exhibit 10.1 to the Quarterly Report on
	Form 10-Q for the Quarterly Period Ended March 31, 2007 filed by the Company on June 15, 2007).**
10.2	Form of Limited Liability Company Operating Agreement of IBG Holdings LLC (filed as Exhibit 10.5 to
	Amendment No. 1 to the Registration Statement on Form S-1 filed by the Company on February 12, 2007).**
10.3	Exchange Agreement by and among Interactive Brokers Group, Inc., IBG Holdings LLC, IBG LLC and the
	Members of IBG LLC (filed as Exhibit 10.3 to the Quarterly Report on Form 10-Q for the Quarterly Period
	Ended September 30, 2009 filed by the Company on November 11, 2009).**
10.4	Tax Receivable Agreement by and between Interactive Brokers Group, Inc. and IBG Holdings LLC (filed as
	Exhibit 10.3 to the Quarterly Report on Form 10-Q for the Quarterly Period Ended March 31, 2007 filed by the
	Company on June 15, 2007).**
10.5	Interactive Brokers Group, Inc. 2007 Stock Incentive Plan (filed as Exhibit 10.8 to Amendment No. 2 to the
	Registration Statement on Form S-1 filed by the Company on April 4, 2007).**+
10.6	Interactive Brokers Group, Inc. 2007 ROI Unit Stock Plan. (filed as Exhibit 10.9 to Amendment No. 2 to the
	Registration Statement on Form S-1 filed by the Company on April 4, 2007).**+
10.7	Interactive Brokers Group, Inc. Amendment to the Exchange Agreement . (filed as Exhibit 10.1 to the
	Form 8-K filed by the Company on June 6, 2012).**
31.1	Certification of Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document*
101.SCH	XBRL Extension Schema*
101.CAL	XBRL Extension Calculation Linkbase*
101.DEF	XBRL Extension Definition Linkbase*
101.LAB	XBRL Extension Label Linkbase*
101.PRE	XBRL Extension Presentation Linkbase*
**	Previously filed; incorporated herein by reference.
+	These exhibits relate to management contracts or compensatory plans or arrangements.
*	Attached as Exhibit 101 to this Amended Quarterly Report on Form 10-Q/A for the quarterly period ended March 31, 2012,
	are the following materials formatted in XBRL (Extensible Business Reporting Language) (i) the Condensed
	Consolidated Statements of Financial Condition, (ii) the Condensed Consolidated Statements of Comprehensive Income,
	(iii) the Condensed Consolidated Statements of Cash Flows, (iv) the Condensed Consolidated Statement
	of Changes in Stockholders' Equity and (v) Notes to Condensed Consolidated Financial Statements tagged in detail levels 1-4.

58

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	INTERACTIVE BROKERS GROUP, INC.
	/s/ Paul J. Brody
	Name: Paul J. Brody
	Title: Chief Financial Officer, Treasurer and Secretary
	(Signing both in his capacity as a duly authorized officer and as principal financial officer of the registrant)
Date: August 31, 2012

59

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Thomas Peterffy, certify that:

1. I have reviewed this Amendment No. 1 to this Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2012 of Interactive Brokers Group, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the Audit Committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

	By:	/s/ Thomas Peterffy
	Name:	Thomas Peterffy
	Title:	Chairman, Chief Executive Officer and President
Date: August 31, 2012

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Paul J. Brody, certify that:

1. I have reviewed this Amendment No. 1 to this Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2012 of Interactive Brokers Group, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the Audit Committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

	By:	/s/ Paul J. Brody
	Name:	Paul J. Brody
	Title:	Chief Financial Officer, Treasurer and Secretary
Date: August 31, 2012

EX-32.1

EXHIBIT 32.1

CERTIFICATION

Pursuant to 18 U.S.C. § 1350, the undersigned officer of Interactive Brokers Group, Inc. (the “Company”) hereby certifies that the Company’s Amendment No. 1 to this Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	By:	/s/ Thomas Peterffy
	Name:	Thomas Peterffy
	Title:	Chairman, Chief Executive Officer and President
Date: August 31, 2012

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Report or as a separate disclosure document.

EX-32.2

EXHIBIT 32.2

CERTIFICATION

Pursuant to 18 U.S.C. § 1350, the undersigned officer of Interactive Brokers Group, Inc. (the “Company”) hereby certifies that the Company’s Amendment No. 1 to this Quarterly Report on Form 10-Q/A for the quarter ended March 31, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	By:	/s/ Paul J. Brody
	Name:	Paul J. Brody
	Title:	Chief Financial Officer, Treasurer and Secretary
Date: August 31, 2012

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Report or as a separate disclosure document.

XML

Comprehensive Income Table (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Comprehensive income
Net income attributable to common stockholders	$ 11,084	$ 16,251
Add net income attributable to non-fair value redemption rights	1,239	405
Net income available for common stockholders - Basic	12,323	16,656
Other comprehensive income:
Cumulative Translation adjustment, before income taxes	4,110	2,005
Income taxes related to items of other comprehensive income	1,484	737
Other comprehensive income (loss), net of tax	2,626	1,268
Comprehensive income available for common stockholders	$ 14,949	$ 17,924
Earnings per share on comprehensive income:
Basic	$ 0.33	$ 0.42
Diluted	$ 0.33	$ 0.42
Weighted average common shares outstanding:
Basic	45,576,925	42,231,651
Diluted	45,951,464	42,791,822

XML

Regulatory Requirements Additional Information (Detail) (All Operating Companies, USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
All Operating Companies
Excess regulatory capital	$ 2,714

XML

Defined Contribution And Employee Incentive Plan Stock Plan Activity Table (Detail)	3 Months Ended
	Mar. 31, 2012
2007 Stock Incentive Plan (Shares)
Beginning Balance	9,408,994
Granted	1,215,866
Forfeited	(51,666)
Distributed	(2,662)
Ending Balance	10,570,532
2007 ROI Unit Stock Plan (Shares)
Beginning Balance	356,149
Granted	0
Forfeited	(327)
Distributed	(431)
Ending Balance	355,391

XML

Related Party Transactions (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Related Party
Due from Related Parties - Customers	$ 1,345	$ 1,291
Due to Related Parties - Customers	$ 438,637	$ 510,623

XML

Senior Secured Revolving Credit Facility (Detail) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

Mar. 31, 2012

Dec. 31, 2011

May 18, 2010

Senior Secured Revolving Credit Facility [Abstract]

Senior secured revolving credit facility

$ 100,000

$ 100,000

Minimum consolidated shareholders' equity

3,625,000

Quarterly Increases % of Positive Net Income

25.00%

Maximum debt to capitalization ratio

30.00%

Minimum liquidity ratio

minimum liquidity ratio of 1.0 to 1.0

Maximum debt to net regulatory capital ratio

35.00%

Senior secured credit facility

$ 0

$ 0

XML

Organization and Nature of Business (Detail)	Mar. 31, 2012	Aug. 04, 2011	May 03, 2007
Organization and Nature of Business
IBG Inc. ownership % of IBG LLC	11.50%	11.50%	10.00%

XML

Restatement Statement of Changes in Equity (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Equity (deficit)
Additional paid-in capital	$ 0	$ 0
Retained earnings (accumulated deficit)	(1,041,240)	(465,138)
Total stockholders' equity (deficit)	(1,032,945)	(459,501)
Other noncontrolling interests	1,920	1,837
Total equity (deficit)	(1,031,025)	(457,664)	(1,195,471)	(2,027,764)
Redeemable noncontrolling interests	5,996,220	5,269,619
As Restated
Equity (deficit)
Additional paid-in capital	0		0
Retained earnings (accumulated deficit)	(1,041,240)		(1,200,735)
Total stockholders' equity (deficit)	(1,032,945)		(1,197,033)
Other noncontrolling interests	1,920		1,562
Total equity (deficit)	(1,031,025)		(1,195,471)
Redeemable noncontrolling interests	5,996,220		5,636,268
Adjustments
Equity (deficit)
Additional paid-in capital	(443,440)		(535,542)
Retained earnings (accumulated deficit)	(1,186,468)		(1,309,490)
Total stockholders' equity (deficit)	(1,629,908)		(1,702,291)
Other noncontrolling interests	(4,366,312)		3,933,977
Total equity (deficit)	(5,996,220)		(5,636,268)
Redeemable noncontrolling interests	5,996,220		5,636,268
Previously reported
Equity (deficit)
Additional paid-in capital	443,440		535,542
Retained earnings (accumulated deficit)	145,228		108,755
Total stockholders' equity (deficit)	596,963		505,258
Other noncontrolling interests	4,368,232		3,935,539
Total equity (deficit)	4,965,195		4,440,797
Redeemable noncontrolling interests	$ 0		$ 0

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Equity and Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Earnings per Share Basic and Diluted

				Three months ended
				March 31,
			2012		2011
Basic earnings per share:
Net income attributable to common stockholders			$	11,084	$	16,251
Add net income attributable to non-fair value redemption rights				1,239		405
	Net income available for common stockholders - Basic		$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A		45,576,825		42,231,551
		Class B		100		100
				45,576,925		42,231,651
	Basic earnings per share		$	0.27	$	0.39

						Three months ended
						March 31,
					2012			2011
Diluted earnings per share:
	Net income available for common stockholders - Basic				$	12,323	$	16,656
	Adjustments for potentially dilutive common shares					-		-
	Net income available for common stockholders - Diluted				$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A:
			Issued and outstanding			45,576,825		42,231,551
			Potentially dilutive common shares:
				Issuable pursuant to 2007 ROI Unit Stock Plan		374,539		560,171
		Class B				100		100
						45,951,464		42,791,822
	Diluted earnings per share				$	0.27	$	0.39

Deferred Tax Assets, Payable to IBGH, APIC

		Deferred Tax Assets		Payable to IBGH		Additional Paid In Capital
May 3, 2007 (IPO)	$	380,785	$	323,668	$	57,117
August 4, 2011		2,984		2,536		448
	$	383,769	$	326,204	$	57,565

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Segment and Geographic Information Segment Table (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Net revenues	$ 303,922	$ 367,888
Income before income taxes	149,677	221,972
Segment Assets	32,696,398		30,404,365
Electronic brokerage
Net revenues	159,326	163,660
Income before income taxes	83,390	90,086
Segment Assets	23,468,167		20,707,771
Market making
Net revenues	142,411	202,338
Income before income taxes	65,968	134,666
Segment Assets	14,373,453		14,389,427
Corporate and eliminations
Net revenues	2,185	1,890
Income before income taxes	319	(2,780)
Segment Assets	$ (5,145,222)		$ (4,692,833)

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Collateralized Transactions Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Collateralized transactions [Abstract]
Customer margin loans outstanding	$ 8,457,962	$ 7,024,792
Securities repledged and deposited for customers	$ 3,300,000	$ 3,800,000
Percentage of securities repledged and deposited for customers	90.00%	91.00%

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Equity And Earnings Per Share Deferred Tax Assets, Payable to IBGH, APIC (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended
	Aug. 31, 2011	Mar. 31, 2012	May 03, 2007
Deferred Tax Assets [Member]
Deferred tax asset arising from Common Stock offerings		$ 383,769	$ 380,785
DTA increase member redemption	2,984
Payable to IBGH [Member]
Tax savings owed to IBG Holdings LLC		326,204	323,668
Period Increase tax savings payable to IBGH	2,536
Additional Paid In Capital [Member]
Tax savings retained by IBG Inc.		57,565	57,117
Deferred tax benefit retained - follow-on offering	$ 448

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Segment and Geographic Information Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Segment and geographic information [Abstract]
Increase in net costs Market Making	$ 1,600
Increase in net costs Electronic Brokerage	$ 2,100

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Defined Contribution and Employee Incentive Plan Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified

3 Months Ended

59 Months Ended

Mar. 31, 2012

Mar. 31, 2011

Mar. 31, 2012

Dec. 31, 2011

May 03, 2007

Dec. 31, 2006

Defined contribution and employee incentive plan additional information

ROI Dollar Unit Payable

$ 9,296

$ 9,296

$ 10,088

Vested balance of ROI payable

9,296

9,296

10,088

ROI dollar compensation expense

115

1,008

Common Stock Shares issued under ROI Unit Stock Plan

1,271,009

ROI Shares issued to IBG LLC

1,250,000

2007 SIP shares issued under ROI Unit Stock Plan

21,009

Fair value ROI Treasury Stock

38,143

Vesting Percentage

· 10% on the first vesting date, which approximates the anniversary of the IPO; and

· an additional 15% on each of the following six anniversaries of the first vesting, assuming continued employment with IBG, Inc. and compliance with non-competition and other applicable covenants.

Fair Value ROI Accrual

17,806

Compensation Expense, ROI Unit Stock Plan

880

893

Estimated future compensation for unvested awards ROI Unit Stock Plan

5,300

5,300

Maximum shares of stock distributable under 2007 Stock Incentive Plan

20,000,000

Shares granted to external directors

14,940

SIP expense requirement year of grant

50.00%

2007 Stock Incentive Plan Compensation Expense

19,625

9,574

Estimated Future 2007 Stock Incentive Plan Compensation Expense

$ 48,200

$ 48,200

Percent of shares forfeited post employment

50.00%

Over 59 percent of shares eligible

100.00%

Former employees vesting schedule (Years)

5

Post employment vesting percentage (Years 1 - 4)

12.50%

Post employment vesting percentage (Year 5)

50.00%

Post employment shares distribution

22,462

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Trading Activities and Related Risks

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Trading Activities and Related Risks

3. Trading Activities and Related Risks

IBG, Inc.’s trading activities include providing securities market making and brokerage services.  Trading activities expose IBG, Inc. to market and credit risks.  These risks are managed in accordance with established risk management policies and procedures.  To accomplish this, management has established a risk management process that includes:

• a regular review of the risk management process by executive management as part of its oversight role;

• defined risk management policies and procedures supported by a rigorous analytic framework; and

• articulated risk tolerance levels as defined by executive management that are regularly reviewed to ensure that IBG, Inc.’s risk-taking is consistent with its business strategy, capital structure, and current and anticipated market conditions.

Market Risk

IBG, Inc. is exposed to various market risks.  Exposures to market risks arise from equity price risk, foreign currency exchange rate fluctuations and changes in interest rates.  IBG, Inc. seeks to mitigate market risk associated with trading inventories by employing hedging strategies that correlate rate, price and spread movements of trading inventories and related financing and hedging activities.  IBG, Inc. uses a combination of cash instruments and exchange traded derivatives to hedge its market exposures.  The following discussion describes the types of market risk faced:

Equity Price Risk

Equity price risk arises from the possibility that equity security prices will fluctuate, affecting the value of equity securities and other instruments that derive their value from a particular stock, a defined basket of stocks, or a stock index.  IBG, Inc. is subject to equity price risk primarily in financial instruments owned and sold but not yet purchased.  IBG, Inc. attempts to limit such risks by continuously reevaluating prices and by diversifying its portfolio across many different options, futures and underlying securities and avoiding concentrations of positions based on the same underlying security.

Currency Risk

Currency risk arises from the possibility that fluctuations in foreign exchange rates will impact the value of financial instruments.  Exchange rate contracts may include cross-currency swaps and currency futures contracts.  Currency swaps are agreements to exchange future payments in one currency for payments in another currency.  These agreements are used to effectively convert assets or liabilities denominated in different currencies.  Currency futures are contracts for delayed delivery of currency at a specified future date.  IBG, Inc. uses currency swaps to manage the levels of its non-U.S. dollar currency balances and currency cash and futures to hedge its global exposure.

Interest Rate Risk

Interest rate risk arises from the possibility that changes in interest rates will affect the value of financial instruments.  IBG, Inc. is exposed to interest rate risk on cash and margin balances, positions carried in equity securities, options and futures and on its debt obligations.  These risks are managed through investment policies and by entering into interest rate futures contracts.

Credit Risk

IBG, Inc. is exposed to risk of loss if an individual, counterparty or issuer fails to perform its obligations under contractual terms (“default risk”).  Both cash instruments and derivatives expose IBG, Inc. to default risk.  IBG, Inc. has established policies and procedures for mitigating credit risk on principal transactions, including reviewing and establishing limits for credit exposure, maintaining collateral, and continually assessing the creditworthiness of counterparties.

The Company’s credit risk is limited in that substantially all of the contracts entered into are settled directly at securities and commodities clearing houses and a small portion is settled through member firms and banks with substantial financial and operational resources.  IBG, Inc. seeks to control the risks associated with its customer margin activities by requiring customers to maintain collateral in compliance with regulatory and internal guidelines.

In the normal course of business, IBG, Inc. executes, settles, and finances various customer securities transactions.  Execution of these transactions includes the purchase and sale of securities by IBG, Inc. that exposes IBG, Inc. to default risk arising from the potential that customers or counterparties may fail to satisfy their obligations.  In these situations, IBG, Inc. may be required to purchase or sell financial instruments at unfavorable market prices to satisfy obligations to customers or counterparties.  Liabilities to other brokers and dealers related to unsettled transactions (i.e., securities fails to receive) are recorded at the amount for which the securities were purchased, and are paid upon receipt of the securities from other brokers or dealers.  In the case of aged securities fails to receive, IBG, Inc. may purchase the underlying security in the market and seek reimbursement for any losses from the counterparty.

For cash management purposes, IBG, Inc. enters into short-term securities purchased under agreements to resell and securities sold under agreements to repurchase transactions (“repos”) in addition to securities borrowing and lending arrangements, all of which may result in credit exposure in the event the counterparty to a transaction is unable to fulfill its contractual obligations.  In accordance with industry practice, repos are collateralized by securities with a market value in excess of the obligation under the contract.  Similarly, securities borrowed and loaned agreements are collateralized by deposits of cash or securities.  IBG, Inc. attempts to minimize credit risk associated with these activities by monitoring collateral values on a daily basis and requiring additional collateral to be deposited with or returned to IBG, Inc. as permitted under contractual provisions.

Concentrations of Credit Risk

IBG, Inc.’s exposure to credit risk associated with its trading and other activities is measured on an individual counterparty basis, as well as by groups of counterparties that share similar attributes.  Concentrations of credit risk can be affected by changes in political, industry, or economic factors.  To reduce the potential for risk concentration, credit limits are established and exposure is monitored in light of changing counterparty and market conditions.  As of March 31, 2012 and December 31, 2011, respectively, the Company did not have any material concentrations of credit risk.

Off-Balance Sheet Risks

IBG, Inc. may be exposed to a risk of loss not reflected in the unaudited condensed consolidated financial statements for futures products, which represent obligations of IBG, Inc. to settle at contracted prices, which may require repurchase or sale in the market at prevailing prices.  Accordingly, these transactions result in off-balance sheet risk as IBG, Inc.’s cost to liquidate such futures contracts may exceed the amounts reported in IBG, Inc.’s unaudited condensed consolidated statements of financial condition.

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Collateralized Transactions Collateralized Table (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Securities Received as Collateral
Securities lending transactions	$ 3,077,123		$ 2,670,232
Agreements to resell	3,612,318		4,173,502
Customer margin securities	11,816,235		9,797,275
Total collateralized transactions	18,505,676		16,641,009
Securities Received and Repledged
Securities lending transactions	3,054,092		2,656,879
Agreements to resell	3,612,318	[1]	4,173,502	[1]
Customer margin securities	972,343		852,739
Total collateralized transactions	$ 7,638,753		$ 7,683,120

[1] At March 31, 2012, $3.3 billion or 90% (at December 31, 2011, $3.8 billion or 91%) of securities acquired through agrements to resell have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.

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Defined Contribution and Employee Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Share grants and Fair Value

	Shares		Fair Value at Date of Grant ($000's)
In connection with IPO	927,943	$	27,847
July 31, 2007	16,665		404
December 31, 2007	1,055,206		32,876
December 31, 2008	2,065,432		35,600
December 31, 2009	2,448,031		42,796
December 31, 2010	2,513,738		43,255
December 31, 2011	3,411,613		50,753
January 6, 2012	1,215,866		18,411
	13,654,494	$	251,942

2007 Stock Incentive Plan, ROI Summary

	Shares
	2007 Stock		2007 ROI Unit
	Incentive Plan		Stock Plan
Balance, December 31, 2011	9,408,994		356,149
Granted	1,215,866		-
Forfeited	(51,666	)	(327	)
Distributed	(2,662	)	(431	)
Balance, March 31, 2012	10,570,532		355,391

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Collateralized Transactions (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Amounts Related to Collateralized Transactions

			March 31, 2012				December 31, 2011
			Securities		Securities		Securities		Securities
			Received as		Received and		Received as		Received and
			Collateral		Repledged		Collateral		Repledged
Securities lending transactions		$	3,077,123	$	3,054,092	$	2,670,232	$	2,656,879
Agreements to resell (1)			3,612,318		3,612,318		4,173,502		4,173,502
Customer margin securities			11,816,235		972,343		9,797,275		852,739
		$	18,505,676	$	7,638,753	$	16,641,009	$	7,683,120
(1)	At March 31, 2012, $3.3 Billion or 90% (at December 31, 2011, $3.8 Billion or 91%) of securities aquired through agreements to resell have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.

Financial instruments owned and pledged where the counterparty has the right to repledge

		March 31,		December 31,
		2012		2011
Stocks	$	1,816,125	$	1,373,990
Corporate and municipal bonds		6,449		4,402
U.S. and foreign government obligations		208,643		167,415
	$	2,031,217	$	1,545,807

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Restatement Statement of Financial Position (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Redeemable noncontrolling interests	$ 5,996,220	$ 5,269,619
Equity (deficit)
Additional paid-in capital	0	0
Retained earnings (accumulated deficit)	(1,041,240)	(465,138)
Total stockholders' equity (deficit)	(1,032,945)	(459,501)
Other noncontrolling interests	1,920	1,837
Total equity (deficit)	(1,031,025)	(457,664)	(1,195,471)	(2,027,764)
Accrued Liabilities	129,289	116,771
As Restated
Redeemable noncontrolling interests	5,996,220		5,636,268
Equity (deficit)
Additional paid-in capital	0		0
Retained earnings (accumulated deficit)	(1,041,240)		(1,200,735)
Total stockholders' equity (deficit)	(1,032,945)		(1,197,033)
Other noncontrolling interests	1,920		1,562
Total equity (deficit)	(1,031,025)		(1,195,471)
Adjustments for Noncontrolling Interests
Redeemable noncontrolling interests	5,996,220		5,636,268
Equity (deficit)
Additional paid-in capital	(443,440)		(535,542)
Retained earnings (accumulated deficit)	(1,186,468)		(1,309,490)
Total stockholders' equity (deficit)	(1,629,908)		(1,702,291)
Other noncontrolling interests	(4,366,312)		3,933,977
Total equity (deficit)	(5,996,220)		(5,636,268)
Previously reported
Redeemable noncontrolling interests	0		0
Equity (deficit)
Additional paid-in capital	443,440		535,542
Retained earnings (accumulated deficit)	145,228		108,755
Total stockholders' equity (deficit)	596,963		505,258
Other noncontrolling interests	4,368,232		3,935,539
Total equity (deficit)	$ 4,965,195		$ 4,440,797

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Collateralized Transactions Right to Repledge Table (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Financial instruments owned and pledged where the counterparty has the right to repledge [Abstract]
Stocks	$ 1,816,125	$ 1,373,990
Corporate and municipal bonds	6,449	4,402
U.S. and foreign government obligations	208,643	167,415
Financial Instruments Owned and Pledged as Collateral - Eligible to be Repledged by Counterparty	$ 2,031,217	$ 1,545,807

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Segment and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Segment and geographic information

	Three months ended
	March 31,
		2012			2011
Net revenues:
Electronic brokerage	$	159,326		$	163,660
Market making		142,411			202,338
Corporate and eliminations		2,185			1,890
Total net revenues	$	303,922		$	367,888
Income before income taxes:
Electronic brokerage	$	83,390		$	90,086
Market making		65,968			134,666
Corporate and eliminations		319			(2,780	)
Total income before income taxes	$	149,677		$	221,972
		March 31,			December 31,
		2012			2011
Segment assets:
Electronic brokerage	$	23,468,167		$	20,707,771
Market making		14,373,453			14,389,427
Corporate and eliminations		(5,145,222	)		(4,692,833	)
Total assets	$	32,696,398		$	30,404,365

		Three months ended
		March 31,
		2012			2011
Net revenues:
United States	$	232,416		$	257,608
International		70,571			108,370
Corporate and eliminations		935			1,910
Total net revenues	$	303,922		$	367,888
Income before income taxes:
United States	$	134,635		$	176,448
International		15,915			48,170
Corporate and eliminations		(873	)		(2,646	)
Total income before income taxes	$	149,677		$	221,972

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Regulatory Requirements (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Regulatory requirements [table]

		Net Capital/ Eligible Equity		Requirement		Excess
IB LLC	$	1,420	$	197	$	1,223
TH LLC		737		41		696
THE		622		224		398
Other regulated Operating Companies		418		21		397
	$	3,197	$	483	$	2,714

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Significant Accounting Policies

2. Significant Accounting Policies

Basis of Presentation

These unaudited condensed consolidated financial statements are presented in U.S. dollars and have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding financial reporting with respect to Form 10-Q/A. and accounting standards generally accepted in the United States of America (“U.S. GAAP”) promulgated in the FASB Accounting Standards Codification (“ASC” or the “Codification”).  These unaudited condensed consolidated financial statements include the accounts of the Company and its subsidiaries and include all adjustments of a normal, recurring nature necessary to present fairly the financial condition as of March 31, 2012 and December 31, 2011, the results of operations and comprehensive income for the three months ended March 31, 2012 and 2011 and cash flows for the three months ended March 31, 2012 and 2011. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in IBG, Inc.’s Annual Report on Form 10-K/A filed with the SEC on August 31, 2012. The condensed consolidated financial statement information as of December 31, 2011 has been derived from the 2011 audited consolidated financial statements. The results of operations for interim periods are not necessarily indicative of results for the entire year.

Gains and losses from foreign currency transactions are included in trading gains and losses where related to market making activities or in interest income where related to the investment of customer funds as part of electronic brokerage activities in the unaudited condensed consolidated statements of comprehensive income.  Non-U.S. subsidiaries have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated to U.S. dollars at period-end exchange rates, while revenues and expenses are translated at average exchange rates during the year.  Adjustments that result from translating amounts from a subsidiary’s functional currency to the U.S. dollar are reported as a component of other comprehensive income.

Principles of Consolidation, including Noncontrolling Interests

The unaudited condensed consolidated financial statements include the accounts of IBG, Inc. and its majority and wholly owned subsidiaries.  As sole managing member of IBG LLC, IBG, Inc. exerts control over the Group’s operations.  In accordance with ASC 810, Consolidation, the Company consolidates the Group’s unaudited condensed consolidated financial statements and records as noncontrolling interest the interests in the Group that IBG, Inc. does not own.

Prior to the June 6, 2012 amendment to the Exchange Agreement (Note 4), the Company was required to report IBG Holdings LLC’s ownership as redeemable noncontrolling interests (i.e., temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (formerly FASB Emerging Issues Task Force Topic D-98), outside of total equity (Note 17) in the unaudited condensed consolidated financial statements.  Redemption value of these redeemable noncontrolling interests is measured as the number of equivalent shares of member interests in IBG LLC owned by IBG Holdings LLC multiplied by the then current market price per share of the Company’s common stock.  The excess of the redemption value over the book value of these interests, which does not affect net income attributable to common stockholders or cash flows, is required to be accounted for as a reduction of the Company’s stockholders’ equity in the consolidated statement of financial condition.

The Company has elected to recognize changes in redemption value in each reporting period immediately as they occur as if the end of each reporting period was also the redemption date for the entire redeemable noncontrolling interest under paragraph 15(b) of ASC 480-10-S99-3A, notwithstanding that the redeemable noncontrolling interests are redeemable over a period of time pursuant to a redemption schedule (Note 4).

The Company’s policy is to consolidate all entities of which it owns more than 50% unless it does not have control.  All inter-company balances and transactions have been eliminated.  IBG, Inc. would also consolidate any Variable Interest Entities (“VIEs”) pursuant to ASC 860, Transfers and Servicing and ASC 810 of which it is the primary beneficiary.  IBG, Inc. currently is not the primary beneficiary of any such entities and therefore no VIEs are included in the unaudited condensed consolidated financial statements.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in the unaudited condensed consolidated financial statements and accompanying notes.  Estimates, by their nature, are based on judgment and available information.  Therefore, actual results could differ materially from those estimates.  Such estimates include the estimated fair values of IBG LLC and the Company in connection with accounting for redeemable noncontrolling interests, value of investments accounted for under the equity method of accounting, the estimated useful lives of property and equipment, including capitalized internally developed software, the allowance for doubtful accounts, compensation accruals, tax liabilities and estimated contingency reserves.

Fair Value

At March 31, 2012 and December 31, 2011, substantially all of IBG, Inc.’s assets and liabilities, including financial instruments, were carried at fair value based on published market prices and are marked to market daily, or were assets which are short-term in nature (such as U.S. government treasury bills or spot foreign exchange) and were carried at amounts that approximate fair value.

IBG, Inc. applies the fair value hierarchy of ASC 820, Fair Value Measurement, to prioritize the inputs to valuation techniques used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities and the lowest priority to unobservable inputs.  The three levels of the fair value hierarchy are:

Level 1	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level 2	Quoted prices in markets that are not considered to be active or financial instruments for which all significant inputs are observable, either directly or indirectly; and
Level 3	Prices or valuations that require inputs that are both significant to fair value measurement and unobservable

Financial instruments owned and financial instruments sold, but not yet purchased, except forward currency contracts, over-the-counter (“OTC”) currency options and certain corporate and municipal debt securities, which are classified as Level 2 financial instruments, are classified within Level 1 of the fair value hierarchy.  The Company’s financial instruments are valued using quoted market prices as published by exchanges and clearing houses or otherwise broadly distributed in active markets, include U.S. government and sovereign obligations, active listed securities, options, futures, options on futures and corporate and municipal debt securities.  IBG, Inc. does not adjust quoted prices for Level 1 financial instruments, even in the event that the Company may hold a large position whereby a purchase or sale could reasonably impact quoted prices.

Currency forward contracts and OTC currency options are valued using broadly distributed bank and broker prices, and are classified as Level 2 financial instruments as such instruments are not exchange-traded.  Corporate and municipal debt securities, including Federal Deposit Insurance Corporation insured corporate bonds held as securities segregated for regulatory purposes, that are not actively traded are also classified in Level 2.

Investments in listed common stock and investments in other fair value non-market making securities, which investments are reported in other assets in the accompanying unaudited condensed consolidated statement of financial condition, are generally reported as Level 2 financial instruments, except for unrestricted listed equities, which are Level 1 financial instruments.  Investments in other non-market making securities include corporate, municipal and asset-backed debt securities, which are Level 2 financial instruments whose fair values are determined using broker and vendor prices.

Earnings Per Share

Earnings per share (“EPS”) are computed in accordance with ASC 260, Earnings per Share.  Shares of Class A and Class B common stock share proportionately in the earnings of IBG, Inc. Basic earnings per share are calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period.  Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for dilutive potential common shares.

                The Company has determined to reflect Topic D-98 measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common shareholders.  Furthermore, in accordance with footnote 17 of ASC 480-10-S99-3A, the Company has elected to treat only the portion of the periodic measurement adjustments that reflect a redemption in excess of fair value as being akin to a dividend, reducing net income available for common stockholders for purposes of applying the two-class method.  Decreases in the carrying amount of redeemable noncontrolling interests through Topic D-98 measurement adjustments are reflected in the application of the two-class method only to the extent they represent recoveries of amounts previously accounted for by applying the two-class method.

Stock-Based Compensation

IBG, Inc. follows ASC 718, Compensation—Stock Compensation, to account for its stock-based compensation plans. ASC 718 requires all share-based payments to employees to be recognized in the financial statements using a fair value-based method. As a result, IBG, Inc. expenses the fair value of stock granted to employees, generally 50% in the year of grant in recognition of plan forfeiture provisions (described below) and the remaining 50% over the related vesting period utilizing the “graded vesting” method permitted under ASC 718-10.  In the case of “retirement eligible” employees (those employees older than 59), 100% of share awards are expensed when granted.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company. The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.

Cash and Cash Equivalents

IBG, Inc. defines cash equivalents as short-term, highly liquid securities and cash deposits with original maturities of three months or less, other than those used for trading purposes.

Cash and Securities—Segregated for Regulatory Purposes

                 As a result of customer activities, certain Operating Companies are obligated by rules mandated by their primary regulators to segregate or set aside cash or qualified securities to satisfy such regulations, which regulations have been promulgated to protect customer assets.  In addition, substantially all of the Operating Companies are members of various clearing organizations at which cash or securities are deposited as required to conduct day-to-day clearance activities.  Securities segregated for regulatory purposes consisted of Federal Deposit Insurance Corporation insured corporate bonds, which are recorded as Level 2 financial assets, in the amount of $414.7 million and $440.4 million at March 31, 2012 and December 31, 2011, U.S. Treasury Bills of $1,447.4 million and $747.9 million at March 31, 2012 and December 31, 2011, which are recorded as Level 1 financial assets and securities purchased under agreements to resell in the amount of $3.3 billion and $3.8 billion as of March 31, 2012 and December 31, 2011, respectively, which amounts approximate fair value.

Securities Borrowed and Securities Loaned

Securities borrowed and securities loaned are recorded at the amount of cash collateral advanced or received.  Securities borrowed transactions require IBG, Inc. to provide counterparties with collateral, which may be in the form of cash, letters of credit or other securities.  With respect to securities loaned, IBG, Inc. receives collateral, which may be in the form of cash or other securities in an amount generally in excess of the fair value of the securities loaned.

IBG, Inc. monitors the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as permitted contractually.  Receivables and payables with the same counterparty are not offset in the unaudited condensed consolidated statements of financial condition.  For these transactions, the fees received or paid by IBG, Inc. are recorded as interest income or interest expense in the unaudited condensed consolidated statements of comprehensive income.

Securities Purchased Under Agreements to Resell

Securities purchased under agreements to resell are treated as collateralized financing transactions and are recorded at contract value, plus accrued interest, which approximates fair value.  The Company’s policy is to obtain possession of collateral with a fair value equal to or in excess of the principal amount loaned under resale agreements.  To ensure that the fair value of the underlying collateral remains sufficient, this collateral is valued daily with additional collateral obtained or excess collateral returned, as permitted under contractual provisions.

Financial Instruments Owned and Sold But Not Yet Purchased

Stocks, government, corporate and municipal bonds, futures and options transactions are reported in the unaudited condensed consolidated financial statements on a trade date basis.  The majority of financial instruments owned and financial instruments sold but not yet purchased are recorded at fair value based upon quoted market prices.  All firm-owned financial instruments pledged to counterparties where the counterparty has the right, by contract or custom, to sell or repledge the financial instruments are classified as financial instruments owned and pledged as collateral in the unaudited condensed consolidated statements of financial condition.

IBG, Inc. also enters into currency forward contracts.  These transactions, which are also reported on a trade date basis, are agreements to exchange a fixed amount of one currency for a specified amount of a second currency at completion of the currency forward contract term.  Unrealized mark-to-market gains and losses on currency forward contracts are reported as components of financial instruments owned or financial instruments sold but not yet purchased in the unaudited condensed consolidated statements of financial condition.  Net earnings or losses are reported as components of interest income in the unaudited condensed consolidated statements of comprehensive income.

Customer Receivables and Payables

Customer securities transactions are recorded on a settlement date basis and customer commodities transactions are recorded on a trade date basis.  Receivables from and payables to customers include amounts due on cash and margin transactions, including futures contracts transacted on behalf of customers.  Securities owned by customers, including those that collateralize margin loans or other similar transactions, are not reported in the unaudited condensed consolidated statements of financial condition.  Amounts receivable from customers that are determined by management to be uncollectible are written off to general and administrative expense.

Receivables from and Payables to Brokers, Dealers and Clearing Organizations

Receivables from brokers, dealers and clearing organizations include amounts receivable for securities not delivered by IBG, Inc. to the purchaser by the settlement date (“fails to deliver”) and margin deposits.  Payables to brokers, dealers and clearing organizations include amounts payable for securities not received by IBG, Inc. from a seller by the settlement date (“fails to receive”).  Receivables and payables to brokers, dealers and clearing organizations also include amounts related to futures contracts executed on behalf of customers as well as net payables and receivables from unsettled trades.

Investments

                 IBG, Inc. makes certain strategic investments in electronic exchange and investment banking platforms and accounts for these investments under the cost method of accounting or under the equity method of accounting as required under ASC 323, Investments—Equity Method and Joint Ventures.  Investments are accounted for under the equity method of accounting when IBG, Inc. has significant influence over the investee.  Investments accounted for under the equity method, including where the investee is a limited partnership or limited liability company, are recorded at the fair value amount of IBG, Inc.’s initial investment and adjusted each period for IBG, Inc.’s share of the investee’s income or loss.  IBG, Inc.’s share of the income or losses from equity investments is reported as a component of other income in the unaudited condensed consolidated statements of comprehensive income and the recorded amounts of IBG, Inc.’s equity investments, which are included in other assets in the unaudited condensed consolidated statements of financial condition, increase or decrease accordingly.  Distributions received from equity investees are recorded as reductions to the respective investment balance.

The Company makes non-market making investments in listed common stock and corporate debt securities.  In addition, other non-market making investments are made to further diversify the Company’s holdings.  These investments are accounted for at fair value (Note 6), with gains and losses recorded as a component of other income.

A judgmental aspect of accounting for investments is evaluating whether an other-than-temporary decline in the value of an investment has occurred.  The evaluation of an other-than-temporary impairment is dependent on specific quantitative and qualitative factors and circumstances surrounding an investment, including recurring operating losses, credit defaults and subsequent rounds of financing.  None of IBG, Inc.’s equity investments have readily determinable market values.  All equity investments are reviewed for changes in circumstances or occurrence of events that suggest IBG, Inc.’s investment may not be recoverable.  If an unrealized loss on any investment is considered to be other-than-temporary, the loss is recognized in the period the determination is made.  IBG, Inc. also holds exchange memberships and investments in equity securities of certain exchanges as required to qualify as a clearing member, and strategic investments in corporate stock that do not qualify for equity method accounting.  Such investments are recorded at cost or, if an other-than-temporary impairment in value has occurred, at a value that reflects management’s estimate of the impairment, and are included in other assets in the unaudited condensed consolidated statements of financial condition.  Dividends are recognized as a component of other income as such dividends are received.

Property and Equipment

Property and equipment, which is a component of other assets, consist of purchased technology hardware and software, internally developed software, leasehold improvements and office furniture and equipment.  Property and equipment are recorded at historical cost, less accumulated depreciation and amortization.  Additions and improvements that extend the lives of assets are capitalized, while expenditures for repairs and maintenance are expensed as incurred.  Depreciation and amortization are computed using the straight-line method.  Equipment is depreciated over the estimated useful lives of the assets, while leasehold improvements are amortized over the lesser of the estimated economic useful life of the asset or the term of the lease.  Computer equipment is depreciated over three to five years and office furniture and equipment are depreciated over five to seven years.  Qualifying costs for internally developed software are capitalized and amortized over the expected useful life of the developed software, not to exceed three years.

Comprehensive Income and Foreign Currency Translation

Reported results on a comprehensive basis reflect the Company’s adoption of Accounting Standards Update 2011-05, Comprehensive Income (“ASU 2011-05”) issued in June 2011.  This standard requires the presentation of a Statement of Comprehensive Income, replacing the former Statement of Income.

Comprehensive income consists of two components: net income and other comprehensive income (“OCI”).  OCI is comprised of revenues, expenses, gains and losses that are reported in the comprehensive income section of the statement of comprehensive income, but are excluded from reported net income.  IBG, Inc.’s OCI is comprised of foreign currency translation adjustments.  Previously, OCI was reported as a component of changes in total equity in the statement of financial condition.

IBG, Inc.’s international Operating Companies have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated into U.S. dollars at period-end exchange rates, and revenues and expenses are translated at average exchange rates prevailing during the period.  Translation gains and losses from market making and electronic brokerage activities, respectively, are included in trading gains and in other income in the accompanying unaudited condensed consolidated statements of comprehensive income.  Adjustments that result from translating amounts from a subsidiary’s functional currency are reported as a component of accumulated other comprehensive income.

Revenue Recognition

                 —Trading Gains

Trading gains and losses are recorded on trade date and are reported on a net basis.  Trading gains are comprised of changes in the fair value of trading assets and liabilities (i.e., unrealized gains and losses) and realized gains and losses.  Dividends are integral to the valuation of stocks and interest is integral to the valuation of fixed income instruments.  Accordingly, both dividends and interest income and expense attributable to specific trading assets and liabilities are reported on a net basis as a component of trading gains in the accompanying unaudited condensed consolidated statements of comprehensive income.

                 —Commissions and Execution Fees

Commissions charged for executing and clearing customer transactions are accrued on a trade date basis and are reported as commissions and execution fees in the unaudited condensed consolidated statements of comprehensive income, and the related expenses are reported as execution and clearing expenses, also on a trade date basis.

                 —Interest Income and Expense

The Company earns interest income and incurs interest expense primarily in connection with its Electronic Brokerage customer business and its securities lending activities.  Such interest is recorded on the accrual basis.

Income Taxes

IBG, Inc. accounts for income taxes in accordance with ASC 740, Income Taxes.  The Company’s income tax expense, deferred tax assets and liabilities, and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid.  We are subject to income taxes in both the United States and numerous foreign jurisdictions.  Determining unaudited condensed consolidated income tax expense requires significant judgments and estimates.

Deferred income tax assets and liabilities arise from temporary differences between the tax and financial statement recognition of the underlying assets and liabilities. In evaluating our ability to recover our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results adjusted for the results of discontinued operations and changes in accounting policies and incorporate assumptions including the amount of future state, federal and foreign pretax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax-planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider three years of cumulative operating income (loss).

The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in a multitude of jurisdictions across our global operations.  Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future.  Management is not aware of any such changes that would have a material effect on the Company’s results of operations, cash flows, or financial position.

ASC 740 provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits.  ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.

The Company records tax liabilities in accordance with ASC 740 and adjusts these liabilities when management’s judgment changes as a result of the evaluation of new information not previously available.  Because of the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities.  These differences will be reflected as increases or decreases to income tax expense in the period in which new information is available.

IBG, Inc. recognizes interest related to income tax matters as interest income or expense and penalties related to income tax matters as income tax expense.

Recently Issued Accounting Pronouncements

financial statements, no ASUs have been issued.  Following is a summary of recently issued ASUs that affected or may affect the Company’s unaudited condensed consolidated financial statements:
 

	Affects	Status
ASU 2011-03	Transfers and Servicing (Topic 860):Reconsideration of Effective Control for Repurchase Agreements	Fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011.  Early application is not permitted.
ASU 2011-04	Fair Value Measurement (Topic 820):Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS	To be applied prospectively for interim and annual periods beginning after December 15, 2011.  Early adoption is not permitted for public entities.
ASU 2011-08	Intangibles - Goodwill and Other (Topic 350):Testing Goodwill for Impairment	Effective for fiscal years beginning after December 15, 2011.  Early adoption is permitted.
ASU 2011-11	Balance Sheet (Topic 210):Disclosures about Offsetting Assets and Liabilities	Effective for fiscal periods beginning on or after January 1, 2013.  Retrospective disclosures for comparative periods presented will be required.

Adoption of those ASUs that became effective during 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, did not have a material effect on those financial statements.  Management is assessing the potential impact on the Company’s financial statements of adopting ASUs that will become effective in the future.

ASC/IFRS Convergence

In February 2010, the SEC issued Commission Statement in Support of Convergence and Global Accounting Standards, a formal statement updating the status of its November 2008 Roadmap for the Potential Use of Financial Statements Prepared in Accordance with International Financial Reporting Standards by U.S. Issuers (“IFRS Roadmap”).  The statement supported convergence of accounting standards and the development of a single set of global accounting standards.  As directed in this statement, the SEC staff issued Work Plan for the Consideration of Incorporating International Financial Reporting Standards into the Financial Reporting System for U.S. Issuers (the “Work Plan”) in May 2010, and issued a follow-up Staff Paper, subtitled Exploring a Possible Method of Incorporation in May 2011.  The Work Plan outlines the steps to be taken to provide the SEC with information to be able to conclude whether IFRS should be adopted for U.S. registrants and the Staff Paper discusses alternative approaches (“Convergence” and “Endorsement”) to adoption that could be applied.  Within the Staff Paper, the SEC Staff has issued a Request for Comment on these alternatives.  The Comment period ended July 31, 2011 and the SEC Staff issued two Staff Papers, A Comparison of U.S. GAAP and IFRS and Analysis of IFRS in Practice on November 16, 2011.

The SEC and U.S. accounting standard setters continue to publicly support a uniform set of global accounting standards, the adoption of IFRS for U.S. registrants and private companies, but the extent and timing of adoption remain uncertain.  The aforementioned Work Plan and other SEC published documents have not committed U.S. registrants to adoption or timing of adoption of IFRS.  The initial adoption for U.S. registrants could be as early as December 31, 2015 or 2016, with a transition date of either January 1, 2013 or 2014 for the initial three year retrospective comparative reporting period.  Management applies versions of IFRS for the stand alone financial statements of several of the Operating Companies, where required, and continues to assess the potential impact of adopting IFRS on the Company’s unaudited condensed consolidated financial statements.

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Restatement (Table)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Restatement [table]

	Three months ended March 31,
		2012		2011
Basic earnings per share - as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Basic earnings per share, as restated	$	0.27	$	0.39
Diluted earnings per share, as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Diluted earnings per share, as restated	$	0.27	$	0.39

(in thousands)			Previously Reported		Adjustments for Noncontrolling Interests			As Restated
March 31, 2012
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)

March 31, 2012
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220

March 31, 2011
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	535,542	$	(535,542	)	$	-
	Retained earnings (accumulated deficit)	$	108,755	$	(1,309,490	)	$	(1,200,735	)
Total stockholders' equity (deficit)		$	505,258	$	(1,702,291	)	$	(1,197,033	)
Other noncontrolling interests		$	3,935,539	$	(3,933,977	)	$	1,562
Total equity (deficit)		$	4,440,797	$	(5,636,268	)	$	(1,195,471	)
Redeemable noncontrolling interests		$	-	$	5,636,268		$	5,636,268

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Fair Value Table (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Securities segregated for regulatory purposes	$ 1,862,148	$ 1,188,265
Financial instruments owned	4,412,405	5,069,271
Financial instruments owned and pledged as collateral	2,031,217	1,545,807
Total trading assets, at fair value	6,443,622	6,615,078
Other assets - investments in non-market making securities	102,261	94,514
Total financial assets, at fair value	8,408,031	7,897,857
Trading liabilities - financial instruments sold but not yet purchased, at fair value	5,674,460	6,156,148
Common Stock [member]
Financial instruments owned	360,790	671,881
Financial instruments owned and pledged as collateral	1,816,125	1,373,990
Other assets - investments in non-market making securities	3,504	3,782
Trading liabilities - financial instruments sold but not yet purchased, at fair value	1,636,238	1,796,160
Options [member]
Financial instruments owned	3,728,623	4,113,539
Trading liabilities - financial instruments sold but not yet purchased, at fair value	3,911,436	4,233,533
U.S. and Foreign Government Obligations [member]
Financial instruments owned	10,192	10,908
Financial instruments owned and pledged as collateral	208,643	167,415
Warrants [member]
Financial instruments owned	122,960	113,603
Trading liabilities - financial instruments sold but not yet purchased, at fair value	583	240
Corporate and municipal bonds [member]
Financial instruments owned	112,083	97,088
Financial instruments owned and pledged as collateral	6,449	4,402
Trading liabilities - financial instruments sold but not yet purchased, at fair value	123,758	122,677
Discount certificates [member]
Financial instruments owned	76,993	60,675
Currency forward contracts [member]
Financial instruments owned	764	1,577
Trading liabilities - financial instruments sold but not yet purchased, at fair value	2,445	3,538
Other non-market making securities [member]
Other assets - investments in non-market making securities	98,757	90,732
Level 1
Securities segregated for regulatory purposes	1,447,406	747,857
Financial instruments owned	4,350,737	5,007,193
Financial instruments owned and pledged as collateral	2,031,217	1,545,807
Total trading assets, at fair value	6,381,954	6,553,000
Other assets - investments in non-market making securities	4,799	5,042
Total financial assets, at fair value	7,834,159	7,305,899
Trading liabilities - financial instruments sold but not yet purchased, at fair value	5,614,015	6,091,099
Level 1 | Common Stock [member]
Financial instruments owned	360,790	671,881
Financial instruments owned and pledged as collateral	1,816,125	1,373,990
Other assets - investments in non-market making securities	3,504	3,782
Trading liabilities - financial instruments sold but not yet purchased, at fair value	1,636,238	1,796,160
Level 1 | Options [member]
Financial instruments owned	3,728,623	4,113,539
Trading liabilities - financial instruments sold but not yet purchased, at fair value	3,911,436	4,233,533
Level 1 | U.S. and Foreign Government Obligations [member]
Financial instruments owned	10,192	10,908
Financial instruments owned and pledged as collateral	208,643	167,415
Level 1 | Warrants [member]
Financial instruments owned	122,960	113,603
Trading liabilities - financial instruments sold but not yet purchased, at fair value	583	240
Level 1 | Corporate and municipal bonds [member]
Financial instruments owned	51,179	36,587
Financial instruments owned and pledged as collateral	6,449	4,402
Trading liabilities - financial instruments sold but not yet purchased, at fair value	65,758	61,166
Level 1 | Discount certificates [member]
Financial instruments owned	76,993	60,675
Level 1 | Other non-market making securities [member]
Other assets - investments in non-market making securities	1,295	1,260
Level 2
Securities segregated for regulatory purposes	414,742	440,408
Financial instruments owned	61,668	62,078
Total trading assets, at fair value	61,668	62,078
Other assets - investments in non-market making securities	97,462	89,472
Total financial assets, at fair value	573,872	591,958
Trading liabilities - financial instruments sold but not yet purchased, at fair value	60,445	65,049
Level 2 | Corporate and municipal bonds [member]
Financial instruments owned	60,904	60,501
Trading liabilities - financial instruments sold but not yet purchased, at fair value	58,000	61,511
Level 2 | Currency forward contracts [member]
Financial instruments owned	764	1,577
Trading liabilities - financial instruments sold but not yet purchased, at fair value	2,445	3,538
Level 2 | Other non-market making securities [member]
Other assets - investments in non-market making securities	$ 97,462	$ 89,472

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Regulatory Requirements Table (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
All Operating Companies
Excess regulatory capital	$ 2,714
Net Capital / Eligible Equity	3,197
Required net capital	483
IB LLC
Excess regulatory capital	1,223
Net Capital / Eligible Equity	1,420
Required net capital	197
TH LLC
Excess regulatory capital	696
Net Capital / Eligible Equity	737
Required net capital	41
THE
Excess regulatory capital	398
Net Capital / Eligible Equity	622
Required net capital	224
Other regulated operating companies
Excess regulatory capital	397
Net Capital / Eligible Equity	418
Required net capital	$ 21

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Condensed Consolidated Statements of Financial Condition (As Restated, Note 17) (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 1,551,399	$ 1,695,495
Cash and securities - segregated for regulatory purposes	11,028,544	10,069,938
Securities borrowed	3,083,729	2,661,671
Securities purchased under agreements to resell	365,229	375,366
Trading assets, at fair value:
Financial instruments owned	4,412,405	5,069,271
Financial instruments owned and pledged as collateral	2,031,217	1,545,807
Total trading assets, at fair value	6,443,622	6,615,078
Other receivables:
Customers, less allowance for doubtful accounts of $3,261 and $3,332 at March 31, 2012 and December 31, 2011	8,457,962	7,024,792
Receivables from brokers, dealers and clearing organizations	1,192,317	1,397,772
Receivable from affiliate	593	595
Interest receivable	22,661	20,540
Total other receivables	9,673,533	8,443,699
Other assets	550,342	543,118
Total assets	32,696,398	30,404,365
Liabilities and equity
Trading liabilities - financial instruments sold but not yet purchased, at fair value	5,674,460	6,156,148
Securities loaned	1,768,117	1,386,059
Short-term borrowings	14,474	6,538
Other payables:
Customers	19,501,916	17,300,105
Payables to brokers, dealers and clearing organizations	334,133	247,360
Payable to affiliate	271,602	271,602
Interest payable	6,974	6,416
Total other payables	20,243,914	17,942,254
Senior notes payable	30,238	101,411
Senior secured credit facility	0	0
Total liabilities	27,731,203	25,592,410
Redeemable noncontrolling interests	5,996,220	5,269,619
Stockholders' equity (deficit):
Common stock	460	460
Additional paid-in capital	0	0
Accumulated deficit	(1,041,240)	(465,138)
Accumulated other comprehensive income, net of income taxes of $11,938 and $10,454 at March 31, 2012 and December 31, 2011	21,113	18,487
Treasury stock, at cost, 484,034 and 484,465 shares at March 31, 2012 and December 31, 2011	(13,278)	(13,310)
Total stockholders' deficit	(1,032,945)	(459,501)
Other noncontrolling interests	1,920	1,837
Total deficit	(1,031,025)	(457,664)
Total liabilities and equity (deficit)	32,696,398	30,404,365
Common Class A
Stockholders' equity (deficit):
Common stock	460	460
Common Class B
Stockholders' equity (deficit):
Common stock	$ 0	$ 0

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Senior Notes Payable (Detail) (USD $)

3 Months Ended

Mar. 31, 2012

Dec. 31, 2011

Senior Notes Payable [Abstract]

Senior notes payable

$ 30,238,000

$ 101,411,000

Senior Notes at 3%

$ 30,238,000

$ 101,411,000

Percent of principal and at which senior notes are able to be redeemed

100.00%

Time to maturity senior notes

All senior notes have an 18-month maturity

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Condensed Consolidated Statements of Changes in Equity (As Restated, Note 17) (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income	Total Stockholders' Equity (Deficit)	Other Non-controlling Interests	Redeemable Noncontrolling Interests
Balance at Dec. 31, 2010	$ (2,027,764)	$ 429	$ 0	$ (19,132)	$ (2,031,656)	$ 21,137	$ (2,029,222)	$ 1,458	$ 6,320,849
Common stock, shares issued at Dec. 31, 2010		42,903,718
Adjustment of redeemable noncontrolling interests to redemption value	814,758		88		814,670		814,758		(684,581)
Redemption of former member interests	(88)		(88)				(88)
Comprehensive income, net of tax	17,623				16,251	1,268	17,519	104
Balance at Mar. 31, 2011	(1,195,471)	429	0	(19,132)	(1,200,735)	22,405	(1,197,033)	1,562	5,636,268
Common stock, shares issued at Mar. 31, 2011		42,903,718
Balance at Dec. 31, 2011	(457,664)	460	0	(13,310)	(465,138)	18,487	(459,501)	1,837	5,269,619
Common stock, shares issued at Dec. 31, 2011		46,061,256
Adjustment of redeemable noncontrolling interests to redemption value	(584,659)		(2,030)		(582,629)		(584,659)		726,601
Common stock distributed to employees	73		41	32			73
Common Stock distributed to employees (in shares)		2,662
Compensation for stock grants vesting in the future	2,027		2,027				2,027	0
Dividends paid to shareholders	(4,557)				(4,557)		(4,557)
Dividends paid by IBG LLC to non-controlling interests	(4)						0	(4)
Adjustments for changes in proportionate ownership in IBG LLC	(38)		(38)				(38)	0
Comprehensive income, net of tax	13,797				11,084	2,626	13,710	87
Balance at Mar. 31, 2012	$ (1,031,025)	$ 460	$ 0	$ (13,278)	$ (1,041,240)	$ 21,113	$ (1,032,945)	$ 1,920	$ 5,996,220
Common stock, shares issued at Mar. 31, 2012		46,063,918

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Equity and Earnings Per Share Basic Table (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Basic earnings per share:
Net income attributable to common stockholders	$ 11,084	$ 16,251
Add net income attributable to non-fair value redemption rights	1,239	405
Net income available for common stockholders - Basic	$ 12,323	$ 16,656
Weighted average shares of common stock outstanding:
Basic	45,576,925	42,231,651
Basic earnings per share	$ 0.27	$ 0.39
Common Class A
Weighted average shares of common stock outstanding:
Basic	45,576,825	42,231,551
Common Class B
Weighted average shares of common stock outstanding:
Basic	100	100

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Subsequent Events

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Subsequent events

16.  Subsequent Events

As required by ASC 855-10-50, the Company has evaluated subsequent events for adjustment to or disclosure in its unaudited condensed consolidated financial statements through the date the unaudited condensed consolidated financial statements were issued.

No recordable or disclosable events, not otherwise reported in these financial statements or the notes thereto, occurred.

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Equity and Earnings Per Share Diluted Table (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Diluted earnings per share:
Net income available for common stockholders - Basic	$ 12,323	$ 16,656
Adjustments for potentially dilutive common shares	0	0
Net income available for common stockholders - Diluted	$ 12,323	$ 16,656
Weighted average shares of common stock outstanding:
Weighted Average Number of Shares Outstanding, Basic	45,576,925	42,231,651
Potentially dilutive common shares:
Issuable pursuant to 2007 ROI Unit Stock Plan	374,539	560,171
Weighted Average Number of Shares Outstanding, Diluted	45,951,464	42,791,822
Diluted earnings per share	$ 0.27	$ 0.39
Common Class A
Weighted average shares of common stock outstanding:
Weighted Average Number of Shares Outstanding, Basic	45,576,825	42,231,551
Common Class B
Weighted average shares of common stock outstanding:
Weighted Average Number of Shares Outstanding, Basic	100	100

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2012

Significant accounting policies

Basis of Presentation

Basis of Presentation

These unaudited condensed consolidated financial statements are presented in U.S. dollars and have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) regarding financial reporting with respect to Form 10-Q/A. and accounting standards generally accepted in the United States of America (“U.S. GAAP”) promulgated in the FASB Accounting Standards Codification (“ASC” or the “Codification”).  These unaudited condensed consolidated financial statements include the accounts of the Company and its subsidiaries and include all adjustments of a normal, recurring nature necessary to present fairly the financial condition as of March 31, 2012 and December 31, 2011, the results of operations and comprehensive income for the three months ended March 31, 2012 and 2011 and cash flows for the three months ended March 31, 2012 and 2011. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in IBG, Inc.’s Annual Report on Form 10-K/A filed with the SEC on August 31, 2012. The condensed consolidated financial statement information as of December 31, 2011 has been derived from the 2011 audited consolidated financial statements. The results of operations for interim periods are not necessarily indicative of results for the entire year.

Gains and losses from foreign currency transactions are included in trading gains and losses where related to market making activities or in interest income where related to the investment of customer funds as part of electronic brokerage activities in the unaudited condensed consolidated statements of comprehensive income.  Non-U.S. subsidiaries have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated to U.S. dollars at period-end exchange rates, while revenues and expenses are translated at average exchange rates during the year.  Adjustments that result from translating amounts from a subsidiary’s functional currency to the U.S. dollar are reported as a component of other comprehensive income.

Principles of Consolidation

Principles of Consolidation, including Noncontrolling Interests

The unaudited condensed consolidated financial statements include the accounts of IBG, Inc. and its majority and wholly owned subsidiaries.  As sole managing member of IBG LLC, IBG, Inc. exerts control over the Group’s operations.  In accordance with ASC 810, Consolidation, the Company consolidates the Group’s unaudited condensed consolidated financial statements and records as noncontrolling interest the interests in the Group that IBG, Inc. does not own.

Prior to the June 6, 2012 amendment to the Exchange Agreement (Note 4), the Company was required to report IBG Holdings LLC’s ownership as redeemable noncontrolling interests (i.e., temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (formerly FASB Emerging Issues Task Force Topic D-98), outside of total equity (Note 17) in the unaudited condensed consolidated financial statements.  Redemption value of these redeemable noncontrolling interests is measured as the number of equivalent shares of member interests in IBG LLC owned by IBG Holdings LLC multiplied by the then current market price per share of the Company’s common stock.  The excess of the redemption value over the book value of these interests, which does not affect net income attributable to common stockholders or cash flows, is required to be accounted for as a reduction of the Company’s stockholders’ equity in the consolidated statement of financial condition.

The Company has elected to recognize changes in redemption value in each reporting period immediately as they occur as if the end of each reporting period was also the redemption date for the entire redeemable noncontrolling interest under paragraph 15(b) of ASC 480-10-S99-3A, notwithstanding that the redeemable noncontrolling interests are redeemable over a period of time pursuant to a redemption schedule (Note 4).

The Company’s policy is to consolidate all entities of which it owns more than 50% unless it does not have control.  All inter-company balances and transactions have been eliminated.  IBG, Inc. would also consolidate any Variable Interest Entities (“VIEs”) pursuant to ASC 860, Transfers and Servicing and ASC 810 of which it is the primary beneficiary.  IBG, Inc. currently is not the primary beneficiary of any such entities and therefore no VIEs are included in the unaudited condensed consolidated financial statements.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts and disclosures in the unaudited condensed consolidated financial statements and accompanying notes.  Estimates, by their nature, are based on judgment and available information.  Therefore, actual results could differ materially from those estimates.  Such estimates include the estimated fair values of IBG LLC and the Company in connection with accounting for redeemable noncontrolling interests, value of investments accounted for under the equity method of accounting, the estimated useful lives of property and equipment, including capitalized internally developed software, the allowance for doubtful accounts, compensation accruals, tax liabilities and estimated contingency reserves.

Fair Value

Fair Value

At March 31, 2012 and December 31, 2011, substantially all of IBG, Inc.’s assets and liabilities, including financial instruments, were carried at fair value based on published market prices and are marked to market daily, or were assets which are short-term in nature (such as U.S. government treasury bills or spot foreign exchange) and were carried at amounts that approximate fair value.

IBG, Inc. applies the fair value hierarchy of ASC 820, Fair Value Measurement, to prioritize the inputs to valuation techniques used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities and the lowest priority to unobservable inputs.  The three levels of the fair value hierarchy are:

Level 1	Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
Level 2	Quoted prices in markets that are not considered to be active or financial instruments for which all significant inputs are observable, either directly or indirectly; and
Level 3	Prices or valuations that require inputs that are both significant to fair value measurement and unobservable

Financial instruments owned and financial instruments sold, but not yet purchased, except forward currency contracts, over-the-counter (“OTC”) currency options and certain corporate and municipal debt securities, which are classified as Level 2 financial instruments, are classified within Level 1 of the fair value hierarchy.  The Company’s financial instruments are valued using quoted market prices as published by exchanges and clearing houses or otherwise broadly distributed in active markets, include U.S. government and sovereign obligations, active listed securities, options, futures, options on futures and corporate and municipal debt securities.  IBG, Inc. does not adjust quoted prices for Level 1 financial instruments, even in the event that the Company may hold a large position whereby a purchase or sale could reasonably impact quoted prices.

Currency forward contracts and OTC currency options are valued using broadly distributed bank and broker prices, and are classified as Level 2 financial instruments as such instruments are not exchange-traded.  Corporate and municipal debt securities, including Federal Deposit Insurance Corporation insured corporate bonds held as securities segregated for regulatory purposes, that are not actively traded are also classified in Level 2.

Investments in listed common stock and investments in other fair value non-market making securities, which investments are reported in other assets in the accompanying unaudited condensed consolidated statement of financial condition, are generally reported as Level 2 financial instruments, except for unrestricted listed equities, which are Level 1 financial instruments.  Investments in other non-market making securities include corporate, municipal and asset-backed debt securities, which are Level 2 financial instruments whose fair values are determined using broker and vendor prices.

Earnings Per Share

Earnings Per Share

Earnings per share (“EPS”) are computed in accordance with ASC 260, Earnings per Share.  Shares of Class A and Class B common stock share proportionately in the earnings of IBG, Inc. Basic earnings per share are calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period.  Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for dilutive potential common shares.

                The Company has determined to reflect Topic D-98 measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common shareholders.  Furthermore, in accordance with footnote 17 of ASC 480-10-S99-3A, the Company has elected to treat only the portion of the periodic measurement adjustments that reflect a redemption in excess of fair value as being akin to a dividend, reducing net income available for common stockholders for purposes of applying the two-class method.  Decreases in the carrying amount of redeemable noncontrolling interests through Topic D-98 measurement adjustments are reflected in the application of the two-class method only to the extent they represent recoveries of amounts previously accounted for by applying the two-class method.

Stock-Based Compensation

Stock-Based Compensation

IBG, Inc. follows ASC 718, Compensation—Stock Compensation, to account for its stock-based compensation plans. ASC 718 requires all share-based payments to employees to be recognized in the financial statements using a fair value-based method. As a result, IBG, Inc. expenses the fair value of stock granted to employees, generally 50% in the year of grant in recognition of plan forfeiture provisions (described below) and the remaining 50% over the related vesting period utilizing the “graded vesting” method permitted under ASC 718-10.  In the case of “retirement eligible” employees (those employees older than 59), 100% of share awards are expensed when granted.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company. The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.

Cash and Cash Equivalents

Cash and Cash Equivalents

IBG, Inc. defines cash equivalents as short-term, highly liquid securities and cash deposits with original maturities of three months or less, other than those used for trading purposes.

Cash and Securities - Segregated for Regulatory Purposes

Cash and Securities—Segregated for Regulatory Purposes

                 As a result of customer activities, certain Operating Companies are obligated by rules mandated by their primary regulators to segregate or set aside cash or qualified securities to satisfy such regulations, which regulations have been promulgated to protect customer assets.  In addition, substantially all of the Operating Companies are members of various clearing organizations at which cash or securities are deposited as required to conduct day-to-day clearance activities.  Securities segregated for regulatory purposes consisted of Federal Deposit Insurance Corporation insured corporate bonds, which are recorded as Level 2 financial assets, in the amount of $414.7 million and $440.4 million at March 31, 2012 and December 31, 2011, U.S. Treasury Bills of $1,447.4 million and $747.9 million at March 31, 2012 and December 31, 2011, which are recorded as Level 1 financial assets and securities purchased under agreements to resell in the amount of $3.3 billion and $3.8 billion as of March 31, 2012 and December 31, 2011, respectively, which amounts approximate fair value.

Securities Borrowed and Securities Loaned

Securities Borrowed and Securities Loaned

Securities borrowed and securities loaned are recorded at the amount of cash collateral advanced or received.  Securities borrowed transactions require IBG, Inc. to provide counterparties with collateral, which may be in the form of cash, letters of credit or other securities.  With respect to securities loaned, IBG, Inc. receives collateral, which may be in the form of cash or other securities in an amount generally in excess of the fair value of the securities loaned.

IBG, Inc. monitors the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as permitted contractually.  Receivables and payables with the same counterparty are not offset in the unaudited condensed consolidated statements of financial condition.  For these transactions, the fees received or paid by IBG, Inc. are recorded as interest income or interest expense in the unaudited condensed consolidated statements of comprehensive income.

Securities Purchased Under Agreements to Resell

Securities Purchased Under Agreements to Resell

Securities purchased under agreements to resell are treated as collateralized financing transactions and are recorded at contract value, plus accrued interest, which approximates fair value.  The Company’s policy is to obtain possession of collateral with a fair value equal to or in excess of the principal amount loaned under resale agreements.  To ensure that the fair value of the underlying collateral remains sufficient, this collateral is valued daily with additional collateral obtained or excess collateral returned, as permitted under contractual provisions.

Financial Instruments Owned and Sold But Not Yet Purchased

Financial Instruments Owned and Sold But Not Yet Purchased

Stocks, government, corporate and municipal bonds, futures and options transactions are reported in the unaudited condensed consolidated financial statements on a trade date basis.  The majority of financial instruments owned and financial instruments sold but not yet purchased are recorded at fair value based upon quoted market prices.  All firm-owned financial instruments pledged to counterparties where the counterparty has the right, by contract or custom, to sell or repledge the financial instruments are classified as financial instruments owned and pledged as collateral in the unaudited condensed consolidated statements of financial condition.

IBG, Inc. also enters into currency forward contracts.  These transactions, which are also reported on a trade date basis, are agreements to exchange a fixed amount of one currency for a specified amount of a second currency at completion of the currency forward contract term.  Unrealized mark-to-market gains and losses on currency forward contracts are reported as components of financial instruments owned or financial instruments sold but not yet purchased in the unaudited condensed consolidated statements of financial condition.  Net earnings or losses are reported as components of interest income in the unaudited condensed consolidated statements of comprehensive income.

Customer Receivables and Payables

Customer Receivables and Payables

Customer securities transactions are recorded on a settlement date basis and customer commodities transactions are recorded on a trade date basis.  Receivables from and payables to customers include amounts due on cash and margin transactions, including futures contracts transacted on behalf of customers.  Securities owned by customers, including those that collateralize margin loans or other similar transactions, are not reported in the unaudited condensed consolidated statements of financial condition.  Amounts receivable from customers that are determined by management to be uncollectible are written off to general and administrative expense.

Receivables from and Payables to Brokers, Dealers and Clearing Organizations

Receivables from and Payables to Brokers, Dealers and Clearing Organizations

Receivables from brokers, dealers and clearing organizations include amounts receivable for securities not delivered by IBG, Inc. to the purchaser by the settlement date (“fails to deliver”) and margin deposits.  Payables to brokers, dealers and clearing organizations include amounts payable for securities not received by IBG, Inc. from a seller by the settlement date (“fails to receive”).  Receivables and payables to brokers, dealers and clearing organizations also include amounts related to futures contracts executed on behalf of customers as well as net payables and receivables from unsettled trades.

Investments Policy

Investments

                 IBG, Inc. makes certain strategic investments in electronic exchange and investment banking platforms and accounts for these investments under the cost method of accounting or under the equity method of accounting as required under ASC 323, Investments—Equity Method and Joint Ventures.  Investments are accounted for under the equity method of accounting when IBG, Inc. has significant influence over the investee.  Investments accounted for under the equity method, including where the investee is a limited partnership or limited liability company, are recorded at the fair value amount of IBG, Inc.’s initial investment and adjusted each period for IBG, Inc.’s share of the investee’s income or loss.  IBG, Inc.’s share of the income or losses from equity investments is reported as a component of other income in the unaudited condensed consolidated statements of comprehensive income and the recorded amounts of IBG, Inc.’s equity investments, which are included in other assets in the unaudited condensed consolidated statements of financial condition, increase or decrease accordingly.  Distributions received from equity investees are recorded as reductions to the respective investment balance.

The Company makes non-market making investments in listed common stock and corporate debt securities.  In addition, other non-market making investments are made to further diversify the Company’s holdings.  These investments are accounted for at fair value (Note 6), with gains and losses recorded as a component of other income.

A judgmental aspect of accounting for investments is evaluating whether an other-than-temporary decline in the value of an investment has occurred.  The evaluation of an other-than-temporary impairment is dependent on specific quantitative and qualitative factors and circumstances surrounding an investment, including recurring operating losses, credit defaults and subsequent rounds of financing.  None of IBG, Inc.’s equity investments have readily determinable market values.  All equity investments are reviewed for changes in circumstances or occurrence of events that suggest IBG, Inc.’s investment may not be recoverable.  If an unrealized loss on any investment is considered to be other-than-temporary, the loss is recognized in the period the determination is made.  IBG, Inc. also holds exchange memberships and investments in equity securities of certain exchanges as required to qualify as a clearing member, and strategic investments in corporate stock that do not qualify for equity method accounting.  Such investments are recorded at cost or, if an other-than-temporary impairment in value has occurred, at a value that reflects management’s estimate of the impairment, and are included in other assets in the unaudited condensed consolidated statements of financial condition.  Dividends are recognized as a component of other income as such dividends are received.

Property and Equipment

Property and Equipment

Property and equipment, which is a component of other assets, consist of purchased technology hardware and software, internally developed software, leasehold improvements and office furniture and equipment.  Property and equipment are recorded at historical cost, less accumulated depreciation and amortization.  Additions and improvements that extend the lives of assets are capitalized, while expenditures for repairs and maintenance are expensed as incurred.  Depreciation and amortization are computed using the straight-line method.  Equipment is depreciated over the estimated useful lives of the assets, while leasehold improvements are amortized over the lesser of the estimated economic useful life of the asset or the term of the lease.  Computer equipment is depreciated over three to five years and office furniture and equipment are depreciated over five to seven years.  Qualifying costs for internally developed software are capitalized and amortized over the expected useful life of the developed software, not to exceed three years.

Comprehensive Income and Foreign Currency Translation

Comprehensive Income and Foreign Currency Translation

Reported results on a comprehensive basis reflect the Company’s adoption of Accounting Standards Update 2011-05, Comprehensive Income (“ASU 2011-05”) issued in June 2011.  This standard requires the presentation of a Statement of Comprehensive Income, replacing the former Statement of Income.

Comprehensive income consists of two components: net income and other comprehensive income (“OCI”).  OCI is comprised of revenues, expenses, gains and losses that are reported in the comprehensive income section of the statement of comprehensive income, but are excluded from reported net income.  IBG, Inc.’s OCI is comprised of foreign currency translation adjustments.  Previously, OCI was reported as a component of changes in total equity in the statement of financial condition.

IBG, Inc.’s international Operating Companies have a functional currency (i.e., the currency in which activities are primarily conducted) that is other than the U.S. dollar.  Such subsidiaries’ assets and liabilities are translated into U.S. dollars at period-end exchange rates, and revenues and expenses are translated at average exchange rates prevailing during the period.  Translation gains and losses from market making and electronic brokerage activities, respectively, are included in trading gains and in other income in the accompanying unaudited condensed consolidated statements of comprehensive income.  Adjustments that result from translating amounts from a subsidiary’s functional currency are reported as a component of accumulated other comprehensive income.

Revenue Recognition

Revenue Recognition

                 —Trading Gains

Trading gains and losses are recorded on trade date and are reported on a net basis.  Trading gains are comprised of changes in the fair value of trading assets and liabilities (i.e., unrealized gains and losses) and realized gains and losses.  Dividends are integral to the valuation of stocks and interest is integral to the valuation of fixed income instruments.  Accordingly, both dividends and interest income and expense attributable to specific trading assets and liabilities are reported on a net basis as a component of trading gains in the accompanying unaudited condensed consolidated statements of comprehensive income.

                 —Commissions and Execution Fees

Commissions charged for executing and clearing customer transactions are accrued on a trade date basis and are reported as commissions and execution fees in the unaudited condensed consolidated statements of comprehensive income, and the related expenses are reported as execution and clearing expenses, also on a trade date basis.

                 —Interest Income and Expense

The Company earns interest income and incurs interest expense primarily in connection with its Electronic Brokerage customer business and its securities lending activities.  Such interest is recorded on the accrual basis.

Income Taxes

Income Taxes

IBG, Inc. accounts for income taxes in accordance with ASC 740, Income Taxes.  The Company’s income tax expense, deferred tax assets and liabilities, and reserves for unrecognized tax benefits reflect management’s best assessment of estimated future taxes to be paid.  We are subject to income taxes in both the United States and numerous foreign jurisdictions.  Determining unaudited condensed consolidated income tax expense requires significant judgments and estimates.

Deferred income tax assets and liabilities arise from temporary differences between the tax and financial statement recognition of the underlying assets and liabilities. In evaluating our ability to recover our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results adjusted for the results of discontinued operations and changes in accounting policies and incorporate assumptions including the amount of future state, federal and foreign pretax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax-planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider three years of cumulative operating income (loss).

The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws and regulations in a multitude of jurisdictions across our global operations.  Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future.  Management is not aware of any such changes that would have a material effect on the Company’s results of operations, cash flows, or financial position.

ASC 740 provides that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, on the basis of the technical merits.  ASC 740 also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.

The Company records tax liabilities in accordance with ASC 740 and adjusts these liabilities when management’s judgment changes as a result of the evaluation of new information not previously available.  Because of the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities.  These differences will be reflected as increases or decreases to income tax expense in the period in which new information is available.

IBG, Inc. recognizes interest related to income tax matters as interest income or expense and penalties related to income tax matters as income tax expense.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

 Subsequent to the adoption of the ASC, the FASB will issue Accounting Standards Updates (“ASUs”) as the means to add to or delete from, or otherwise amend the ASC.  In 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, no ASUs have been issued.  Following is a summary of recently issued ASUs that affected or may affect the Company’s unaudited condensed consolidated financial statements:
 

	Affects	Status
ASU 2011-03	Transfers and Servicing (Topic 860):Reconsideration of Effective Control for Repurchase Agreements	Fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011.  Early application is not permitted.
ASU 2011-04	Fair Value Measurement (Topic 820):Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS	To be applied prospectively for interim and annual periods beginning after December 15, 2011.  Early adoption is not permitted for public entities.
ASU 2011-08	Intangibles - Goodwill and Other (Topic 350):Testing Goodwill for Impairment	Effective for fiscal years beginning after December 15, 2011.  Early adoption is permitted.
ASU 2011-11	Balance Sheet (Topic 210):Disclosures about Offsetting Assets and Liabilities	Effective for fiscal periods beginning on or after January 1, 2013.  Retrospective disclosures for comparative periods presented will be required.

Adoption of those ASUs that became effective during 2012, prior to the issuance of the Company’s unaudited condensed consolidated financial statements, did not have a material effect on those financial statements.  Management is assessing the potential impact on the Company’s financial statements of adopting ASUs that will become effective in the future.

ASC/IFRS Convergence

ASC/IFRS Convergence

In February 2010, the SEC issued Commission Statement in Support of Convergence and Global Accounting Standards, a formal statement updating the status of its November 2008 Roadmap for the Potential Use of Financial Statements Prepared in Accordance with International Financial Reporting Standards by U.S. Issuers (“IFRS Roadmap”).  The statement supported convergence of accounting standards and the development of a single set of global accounting standards.  As directed in this statement, the SEC staff issued Work Plan for the Consideration of Incorporating International Financial Reporting Standards into the Financial Reporting System for U.S. Issuers (the “Work Plan”) in May 2010, and issued a follow-up Staff Paper, subtitled Exploring a Possible Method of Incorporation in May 2011.  The Work Plan outlines the steps to be taken to provide the SEC with information to be able to conclude whether IFRS should be adopted for U.S. registrants and the Staff Paper discusses alternative approaches (“Convergence” and “Endorsement”) to adoption that could be applied.  Within the Staff Paper, the SEC Staff has issued a Request for Comment on these alternatives.  The Comment period ended July 31, 2011 and the SEC Staff issued two Staff Papers, A Comparison of U.S. GAAP and IFRS and Analysis of IFRS in Practice on November 16, 2011.

The SEC and U.S. accounting standard setters continue to publicly support a uniform set of global accounting standards, the adoption of IFRS for U.S. registrants and private companies, but the extent and timing of adoption remain uncertain.  The aforementioned Work Plan and other SEC published documents have not committed U.S. registrants to adoption or timing of adoption of IFRS.  The initial adoption for U.S. registrants could be as early as December 31, 2015 or 2016, with a transition date of either January 1, 2013 or 2014 for the initial three year retrospective comparative reporting period.  Management applies versions of IFRS for the stand alone financial statements of several of the Operating Companies, where required, and continues to assess the potential impact of adopting IFRS on the Company’s unaudited condensed consolidated financial statements.

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Organization and Nature Of Business

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Organization and nature of business

1. Organization and Nature of Business

Interactive Brokers Group, Inc. (“IBG, Inc.” or the “Company”) is a Delaware holding company whose primary asset is its ownership of approximately 11.5% of the membership interests of IBG LLC, which, in turn, owns operating subsidiaries (collectively, “IBG LLC” or the “Group”).  The accompanying unaudited condensed consolidated financial statements of IBG, Inc. reflect the consolidation of IBG, Inc.’s investment in IBG LLC for all periods presented (Note 4).  IBG LLC is an automated global electronic broker and market maker specializing in routing orders and processing trades in securities, futures and foreign exchange instruments.

IBG LLC is a Connecticut limited liability company that conducts its business through its operating subsidiaries (collectively called the “Operating Companies”): Timber Hill LLC (“TH LLC”), Timber Hill Europe AG (“THE”), Timber Hill Securities Hong Kong Limited (“THSHK”), Timber Hill Australia Pty Limited (“THA”), Timber Hill Canada Company (“THC”), Interactive Brokers LLC (“IB LLC”) and subsidiary, Interactive Brokers Canada Inc. (“IBC”), Interactive Brokers (U.K.) Limited (“IBUK”), Interactive Brokers (India) Private Limited (“IBI”), Interactive Brokers Financial Products S.A. (“IBFP”), Interactive Brokers Hungary KFT (“IBH”), IB Exchange Corp. (“IBEC”), Interactive Brokers Securities Japan, Inc. (“IBSJ”), IB Brasil Participações Ltda (“IBBH”), Interactive Brokers Software Services Estonia OU (“IBEST”) and Interactive Brokers Software Services Russia (“IBRUS”).

IBG, Inc. operates in two business segments, electronic brokerage and market making.  IBG, Inc. conducts its electronic brokerage business through its Interactive Brokers subsidiaries, which provide electronic execution and clearing services to customers worldwide.  The Company conducts its market making business principally through its Timber Hill subsidiaries on the world’s leading exchanges and market centers, primarily in exchange-traded equities, equity options and equity-index options and futures.

Certain of the Operating Companies are members of various securities and commodities exchanges in North America, Europe and the Asia/Pacific region and are subject to regulatory capital and other requirements (Note 14).  IB LLC, IBUK, IBC, IBI and IBSJ carry securities accounts for customers or perform custodial functions relating to customer securities.

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Condensed Consolidated Statements of Financial Condition (As Restated, Note 17) (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts	$ 3,261	$ 3,332
Accumulated Other Comprehensive Income (Loss), Tax	$ 11,938	$ 10,454
Treasury stock shares	484,034	484,465
Common Class A
Common stock, par value	$ 0.01	$ 0.01
Shares authorized	1,000,000,000	1,000,000,000
Shares issued	46,063,918	46,061,256
Common stock, shares outstanding	45,579,884	45,576,791
Common Class B
Common stock, par value	$ 0.01	$ 0.01
Shares authorized	100	100
Shares issued	100	100
Common stock, shares outstanding	100	100

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Income Taxes

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Income taxes

11. Income Taxes

Income tax expense for the three months ended March 31, 2012 and 2011 differs from the U.S. federal statutory rate due to the differing effective tax rates in foreign, state and local jurisdictions where certain operating companies are subject to corporate taxation.  Deferred income taxes arise due to the amortization of the deferred tax assets recognized in connection with the Common Stock offerings (Note 4), valuation of THE’s financial assets and liabilities and temporary differences arising from the deductibility of compensation and depreciation expenses in different time periods for book and tax return purposes.  The retained earnings of certain foreign subsidiaries of IBG, Inc., which are considered permanently reinvested, may be subject to additional U.S. income taxes if such earnings were to be distributed.  The Company has not provided deferred U.S income taxes since the tax bases of such subsidiaries exceed their book bases.

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Documentation and Entity Information	3 Months Ended
	Mar. 31, 2012	May 08, 2012 Common Class A	May 08, 2012 Common Class B
Entity Registrant Name	INTERACTIVE BROKERS GROUP, INC.
Entity Central Index Key	0001381197
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Amendment Flag	false
Fiscal Year Focus	2012
Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Common Stock Shares Outstanding		45,579,884	100

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Commitments, Contingencies and Guarantees

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Commitments, Contingencies and Guarantees

12. Commitments, Contingencies and Guarantees

Litigation

The Company is subject to certain pending and threatened legal actions which arise out of the normal course of business.  Litigation is inherently unpredictable, particularly in proceedings where claimants seek substantial or indeterminate damages, or which are in their early stages.  IBG, Inc. cannot predict with certainty the actual loss or range of loss related to such legal proceedings, the manner in which they will be resolved, the timing of final resolution or the ultimate settlement.  Although the results of legal actions cannot be predicted with certainty, it is the opinion of management that the resolution of these actions is not expected to have a material effect, if any, on our business or financial condition, but may have a material impact on the results of operations for a given period.

On February 3, 2010, Trading Technologies International, Inc. (“Trading Technologies”) filed a complaint in the United States District Court for the Northern District of Illinois, Eastern Division, against Interactive Brokers Group, Inc., IBG LLC, IBG Holdings LLC, and Interactive Brokers LLC.  Thereafter, Trading Technologies dismissed Interactive Brokers Group, Inc. and IBG Holdings LLC from the case, leaving only IBG LLC and Interactive Brokers LLC as defendants (“Defendants”).  The operative complaint, as amended, alleges that the Defendants have infringed and continue to infringe twelve U.S. patents held by Trading Technologies.  Trading Technologies is seeking, among other things, unspecified damages and injunctive relief.  The case is in the early stages and discovery has yet to begin.  While it is too early to predict the outcome of the matter, we believe we have meritorious defenses to the allegations made in the complaint and intend to defend ourselves vigorously against them.  However, litigation is inherently uncertain and there can be no guarantee that the Company will prevail or that the litigation can be settled on favorable terms.

IBG, Inc. accounts for potential losses related to litigation in accordance with ASC 450, Contingencies.  As of March 31, 2012 and December 31, 2011, reserves provided for potential losses related to litigation matters were not material.

Guarantees

Certain of the Operating Companies provide guarantees to securities clearing houses and exchanges which meet the accounting definition of a guarantee under ASC 460, Guarantees.  Under the standard membership agreement, members are required to guarantee collectively the performance of other members.  Under the agreements, if another member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet shortfalls.  In the opinion of management, the Operating Companies’ liability under these arrangements is not quantifiable and could exceed the cash and securities they have posted as collateral.  However, the potential for these Operating Companies to be required to make payments under these arrangements is remote.  Accordingly, no contingent liability is carried in the unaudited condensed consolidated statements of financial condition for these arrangements.

In connection with its retail brokerage business, IB LLC performs securities and commodities execution, clearance and settlement on behalf of its customers for whom it commits to settle trades submitted by such customers with the respective clearing houses.  If a customer fails to fulfill its obligation, IB LLC must fulfill the customer’s obligation with the trade counterparty.  No contingent liability is carried on the unaudited condensed consolidated statements of financial condition for such customer obligations.

Other Commitments

Certain clearing houses and clearing banks and firms used by certain Operating Companies are given a security interest in certain assets of those Operating Companies held by those clearing organizations.  These assets may be applied to satisfy the obligations of those Operating Companies to the respective clearing organizations.

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Condensed Consolidated Statements of Comprehensive Income (As Restated, Note 17) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Trading gains	$ 137,280	$ 200,338
Commissions and execution fees	100,885	109,199
Interest income	66,576	58,663
Other income	18,324	17,435
Total revenues	323,065	385,635
Interest expense	19,143	17,747
Total net revenues	303,922	367,888
Non-interest expenses:
Execution and clearing	64,624	66,237
Employee compensation and benefits	62,725	52,359
Occupancy, depreciation and amortization	9,934	9,246
Communications	5,674	5,448
General and administrative	11,288	12,626
Total non-interest expenses	154,245	145,916
Income before income taxes	149,677	221,972
Income tax expense	8,734	18,732
Net income	140,943	203,240
Less net income attributable to noncontrolling interests	129,859	186,989
Net income attributable to common stockholders	11,084	16,251
Earnings per share:
Basic	$ 0.27	$ 0.39
Diluted	$ 0.27	$ 0.39
Weighted average common shares outstanding:
Basic	45,576,925	42,231,651
Diluted	45,951,464	42,791,822
Comprehensive income:
Net income attributable to common stockholders	11,084	16,251
Other comprehensive income:
Cumulative Translation adjustment, before income taxes	4,110	2,005
Income taxes related to items of other comprehensive income	1,484	737
Other comprehensive income (loss), net of tax	2,626	1,268
Comprehensive income attributable to common stockholders	13,710	17,519
Comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	129,859	186,989
Other comprehensive income (loss) - cumulative translation adjustment	31,551	16,618
Comprehensive income attributable to noncontrolling interests	$ 161,410	$ 203,607

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Fair Value

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Fair value

6. Fair Value

The following tables set forth, by level within the fair value hierarchy (Note 2), financial assets and liabilities, primarily financial instruments owned and financial instruments sold, but not yet purchased at fair value as of March 31, 2012 and December 31, 2011.  As required by ASC 820, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

		Financial Assets At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	1,447,406	$	414,742	$	-	$	1,862,148
Financial instruments owned:
	Stocks		360,790		-		-		360,790
	Options		3,728,623		-		-		3,728,623
	U.S. and foreign government obligations		10,192		-		-		10,192
	Warrants		122,960		-		-		122,960
	Corporate and municipal bonds		51,179		60,904		-		112,083
	Discount certificates		76,993		-		-		76,993
	Currency forward contracts		-		764		-		764
			4,350,737		61,668		-		4,412,405
Financial instruments owned and pledged as collateral:
	Stocks		1,816,125		-		-		1,816,125
	Corporate and municipal bonds		6,449		-		-		6,449
	U.S. and foreign government obligations		208,643		-		-		208,643
			2,031,217		-		-		2,031,217
			6,381,954		61,668		-		6,443,622
Other assets - investments in non-market making securities
	Investments in common stock		3,504		-		-		3,504
	Investments in other non-market making securities		1,295		97,462		-		98,757
		$	7,834,159	$	573,872	$	-	$	8,408,031

		Financial Liabilities At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,636,238	$	-	$	-	$	1,636,238
	Options		3,911,436		-		-		3,911,436
	Warrants		583		-		-		583
	Corporate bonds		65,758		58,000		-		123,758
	Currency forward contracts		-		2,445		-		2,445
		$	5,614,015	$	60,445	$	-	$	5,674,460

		Financial Assets At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	747,857	$	440,408	$	-	$	1,188,265
Financial instruments owned:
	Stocks		671,881		-		-		671,881
	Options		4,113,539		-		-		4,113,539
	U.S. and foreign government obligations		10,908		-		-		10,908
	Warrants		113,603		-		-		113,603
	Corporate and municipal bonds		36,587		60,501		-		97,088
	Discount certificates		60,675		-		-		60,675
	Currency forward contracts		-		1,577		-		1,577
			5,007,193		62,078		-		5,069,271
Financial instruments owned and pledged as collateral:
	Stocks		1,373,990		-		-		1,373,990
	Corporate and municipal bonds		4,402		-		-		4,402
	U.S. and foreign government obligations		167,415		-		-		167,415
			1,545,807		-		-		1,545,807
			6,553,000		62,078		-		6,615,078
Other assets - investments in non-market making securities
	Investments in common stock		3,782		-		-		3,782
	Investments in other non-market making securities		1,260		89,472		-		90,732
		$	7,305,899	$	591,958	$	-	$	7,897,857
		Financial Liabilities At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,796,160	$	-	$	-	$	1,796,160
	Options		4,233,533		-		-		4,233,533
	Warrants		240		-		-		240
	Corporate bonds		61,166		61,511		-		122,677
	Currency forward contracts		-		3,538		-		3,538
		$	6,091,099	$	65,049	$	-	$	6,156,148

As of March 31, 2012 and December 31, 2011, the Company did not hold any sovereign obligations of Portugal, Ireland, Italy, Greece or Spain.

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Comprehensive Income

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Comprehensive Income

5. Comprehensive Income

Comprehensive income is comprised of Net Income and Other Comprehensive Income (“OCI”).  The Company’s OCI is comprised of foreign currency translation adjustments, which arise from changes in the U.S. dollar value of the net worth of the Company’s international Operating Companies during respective reporting periods.  The following table presents comprehensive income, net of income taxes, and earnings per share, calculated using the two-class method, on comprehensive income (as restated):

			Three months ended
			March 31,
				2012		2011
	Net income attributable to common stockholders		$	11,084	$	16,251
	Add net income attributable to non-fair value redemption rights			1,239		405
	Net income available for common stockholders			12,323		16,656
	Other comprehensive income:
		Cumulative translation adjustment, before income taxes		4,110		2,005
		Income taxes related to items of other comprehensive income		1,484		737
	Other comprehensive income, net of tax			2,626		1,268
	Comprehensive income available for common stockholders		$	14,949	$	17,924
Earnings per share on comprehensive income:
		Basic	$	0.33	$	0.42
		Diluted	$	0.33	$	0.42
	Weighted average common shares outstanding:
		Basic		45,576,925		42,231,651
		Diluted		45,951,464		42,791,822

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Restatement

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Restatement

17.  Restatement

Accounting for Noncontrolling Interests in IBG LLC Attributable to IBG Holdings LLC

Subsequent to the issuance of the Company’s 2011 Annual Report on Form 10-K, the Company identified an error in its accounting for noncontrolling interests in IBG LLC attributable to IBG Holdings LLC.  Pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A, prior to the Amendment (Note 4), these interests were required to be accounted for and reported as “redeemable noncontrolling interests” (temporary equity).  The revised accounting results in the reporting of redeemable noncontrolling interests as a separate category in the statement of financial condition, outside of total equity, and at redemption value.  The difference between redemption value and book value is reported as a direct charge to stockholders’ equity (deficit).  There is no effect on total assets or liabilities in the statement of financial condition, or on reported net income attributable to common stockholders.  However, as a result of the classification of IBG Holdings LLC’s noncontrolling interests in IBG LLC as redeemable noncontrolling interests, the calculation of earnings per share was affected, as described below.

Effect on Earnings Per Share (reported in the Statement of Comprehensive Income):

As a result of the error affecting redeemable noncontrolling interests described above, pursuant to the requirements of ASC 480-10-S99, the Company was required to calculate earnings per share using the two-class method to give effect in its calculation of net income available to common stockholders to the cash redemption feature as an other than fair value redemption feature.  For the Company, under U.S. GAAP, this other than fair value redemption feature is measured by the change in the difference between the fair value of LLC and the fair value of the Company.  This difference equals the Company’s share of the tax benefits arising from the sale of stock in May 2007 at the IPO and in connection with the August 2011 member interest redemption transaction, or $57.6 million that has been retained by the Company.

Under the two-class method as applied by the Company (Note 2), the recognition of the cash redemption feature does not affect net income attributable to common stockholders, but allocates a portion of earnings to this other than fair value redemption right that would otherwise be available to common stockholders, calculated as the previously described difference between the respective fair values of LLC and the Company.  The effect on earnings per share was:

	Three months ended March 31,
		2012		2011
Basic earnings per share - as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Basic earnings per share, as restated	$	0.27	$	0.39
Diluted earnings per share, as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Diluted earnings per share, as restated	$	0.27	$	0.39

Effect on the Statement of Financial Condition:

(in thousands)			Previously Reported		Adjustments for Noncontrolling Interests			As Restated
March 31, 2012
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)

Effect on the Statement of Changes in Equity:

The following information is provided to facilitate readers’ understanding of the effects of these errors on the ending balances reported in the statement of changes in equity as of March 31, 2012 and 2011:

March 31, 2012
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220

March 31, 2011
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	535,542	$	(535,542	)	$	-
	Retained earnings (accumulated deficit)	$	108,755	$	(1,309,490	)	$	(1,200,735	)
Total stockholders' equity (deficit)		$	505,258	$	(1,702,291	)	$	(1,197,033	)
Other noncontrolling interests		$	3,935,539	$	(3,933,977	)	$	1,562
Total equity (deficit)		$	4,440,797	$	(5,636,268	)	$	(1,195,471	)
Redeemable noncontrolling interests		$	-	$	5,636,268		$	5,636,268

17.  Restatement

Accounting for Noncontrolling Interests in IBG LLC Attributable to IBG Holdings LLC

Subsequent to the issuance of the Company’s 2011 Annual Report on Form 10-K, the Company identified an error in its accounting for noncontrolling interests in IBG LLC attributable to IBG Holdings LLC.  Pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A, prior to the Amendment (Note 4), these interests were required to be accounted for and reported as “redeemable noncontrolling interests” (temporary equity).  The revised accounting results in the reporting of redeemable noncontrolling interests as a separate category in the statement of financial condition, outside of total equity, and at redemption value.  The excess of redemption value over book value is reported as a direct charge to stockholders’ equity (deficit).  There is no effect on total assets or liabilities in the statement of financial condition, or on reported net income attributable to common stockholders.  However, as a result of the classification of IBG Holdings LLC’s noncontrolling interests in IBG LLC as redeemable noncontrolling interests, the calculation of earnings per share was affected, as described below.

Effect on Earnings Per Share (reported in the Statement of Comprehensive Income):

As a result of the error affecting redeemable noncontrolling interests described above, pursuant to the requirements of ASC 480-10-S99, the Company was required to calculate earnings per share using the two-class method to give effect in its calculation of net income available to common stockholders to the cash redemption feature as an other than fair value redemption feature.  For the Company, under U.S. GAAP, this other than fair value redemption feature is measured by the change in the difference between the fair value of LLC and the fair value of the Company.  This difference equals the Company’s share of the tax benefits arising from the sale of stock in May 2007 at the IPO and in connection with the August 2011 member interest redemption transaction, or $57.6 million that has been retained by the Company.

Under the two-class method as applied by the Company (Note 2), the recognition of the cash redemption feature does not affect net income attributable to common stockholders, but allocates a portion of earnings to this other than fair value redemption right that would otherwise be available to common stockholders, calculated as the previously described difference between the respective fair values of LLC and the Company.  The effect on earnings per share was:

	Three months ended March 31,
		2012		2011
Basic earnings per share - as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Basic earnings per share, as restated	$	0.27	$	0.39
Diluted earnings per share, as reported in respective years' initial filings	$	0.24	$	0.38
Adjustments to correct errors:
Adjustments to give effect to assumed redemptions		0.03		0.01
Diluted earnings per share, as restated	$	0.27	$	0.39

Effect on the Statement of Financial Condition:

(in thousands)			Previously Reported		Adjustments for Noncontrolling Interests			As Restated
March 31, 2012
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)

Effect on the Statement of Changes in Equity:

The following information is provided to facilitate readers’ understanding of the effects of these errors on the ending balances reported in the statement of changes in equity as of March 31, 2012 and 2011:

March 31, 2012
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	443,440	$	(443,440	)	$	-
	Retained earnings (accumulated deficit)	$	145,228	$	(1,186,468	)	$	(1,041,240	)
Total stockholders' equity (deficit)		$	596,963	$	(1,629,908	)	$	(1,032,945	)
Other noncontrolling interests		$	4,368,232	$	(4,366,312	)	$	1,920
Total equity (deficit)		$	4,965,195	$	(5,996,220	)	$	(1,031,025	)
Redeemable noncontrolling interests		$	-	$	5,996,220		$	5,996,220

March 31, 2011
(in thousands)			Previously Reported		Adjustments			As Restated
Equity (deficit):
Stockholders' equity (deficit):
	Additional paid-in capital	$	535,542	$	(535,542	)	$	-
	Retained earnings (accumulated deficit)	$	108,755	$	(1,309,490	)	$	(1,200,735	)
Total stockholders' equity (deficit)		$	505,258	$	(1,702,291	)	$	(1,197,033	)
Other noncontrolling interests		$	3,935,539	$	(3,933,977	)	$	1,562
Total equity (deficit)		$	4,440,797	$	(5,636,268	)	$	(1,195,471	)
Redeemable noncontrolling interests		$	-	$	5,636,268		$	5,636,268

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Segment and Geographic Information

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Segment and Geographic Information

13. Segment and Geographic Information

IBG, Inc. operates in two business segments, market making and electronic brokerage.  The Company conducts its market making business principally through its Timber Hill subsidiaries on the world’s leading exchanges and market centers, primarily in exchange-traded equities, equity options and equity-index options and futures.  IBG, Inc. conducts its electronic brokerage business through its Interactive Brokers subsidiaries, which provide electronic execution and clearing services to customers worldwide.

There are significant transactions and balances between the Operating Companies, primarily as a result of certain Operating Companies holding exchange or clearing organization memberships, which are utilized to provide execution and clearing services to affiliates.  Charges for transactions between segments are designed to approximate full costs.  Intra-segment and intra-region income and expenses and related balances have been eliminated in this segment and geographic information to accurately reflect the external business conducted in each segment or geographical region.  Corporate items include non-allocated corporate income and expenses that are not attributed to segments for performance measurement, corporate assets and eliminations.

Management believes that the following information by business segment provides a reasonable representation of each segment’s contribution to total net revenues and income before income taxes for the three months ended March 31, 2012 and 2011, and to total assets as of March 31, 2012 and December 31, 2011:

	Three months ended
	March 31,
		2012			2011
Net revenues:
Electronic brokerage	$	159,326		$	163,660
Market making		142,411			202,338
Corporate and eliminations		2,185			1,890
Total net revenues	$	303,922		$	367,888
Income before income taxes:
Electronic brokerage	$	83,390		$	90,086
Market making		65,968			134,666
Corporate and eliminations		319			(2,780	)
Total income before income taxes	$	149,677		$	221,972
		March 31,			December 31,
		2012			2011
Segment assets:
Electronic brokerage	$	23,468,167		$	20,707,771
Market making		14,373,453			14,389,427
Corporate and eliminations		(5,145,222	)		(4,692,833	)
Total assets	$	32,696,398		$	30,404,365

In connection with its ongoing review and analysis of the costs of operating its businesses, commencing in the second quarter of 2011, IBG LLC increased its allocation of corporate expenses to the operating segments in the form of intercompany administrative fees to include non-cash compensation, primarily SIP costs.  Increased intercompany administrative fees, which are eliminated in consolidation, will affect the operating segments’ income before income taxes.  The effect for the three months ended March 31, 2012 was an increase in net costs charged to the Electronic Brokerage segment of $2.1 million, and to the Market Making segment of $1.6 million, respectively, offset by increases in intercompany fee revenue recognized in the Corporate segment.

The Company operates its automated global business in U.S. and international markets on more than 100 exchanges and market centers.  A significant portion of IBG, Inc.’s net revenues are generated by subsidiaries operating outside the United States.  International operations are comprised of market making and electronic brokerage activities in 24 countries in Europe, Asia and North America (outside the United States).  The following table presents total net revenues and income before income taxes by geographic area for the three months ended March 31, 2012 and 2011:

		Three months ended
		March 31,
		2012			2011
Net revenues:
United States	$	232,416		$	257,608
International		70,571			108,370
Corporate and eliminations		935			1,910
Total net revenues	$	303,922		$	367,888
Income before income taxes:
United States	$	134,635		$	176,448
International		15,915			48,170
Corporate and eliminations		(873	)		(2,646	)
Total income before income taxes	$	149,677		$	221,972

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Senior Secured Revolving Credit Facility

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Senior Secured Revolving Credit Facility

9. Senior Secured Revolving Credit Facility

On May 18, 2010, IBG LLC entered into a $100 million two-year senior secured revolving credit facility with Bank of America, N.A. as administrative agent and Citibank, N.A., as syndication agent.  IBG LLC is the sole borrower under this credit facility.  The facility’s interest rate is indexed to the overnight federal funds rate or to the LIBOR rate for the relevant term, at the borrower’s option, and is secured by a first priority interest in all of the capital stock of each entity owned directly by IBG LLC (subject to customary limitations with respect to foreign subsidiaries).  The facility may be used to finance working capital needs and general corporate purposes, including downstreaming funds to IBG LLC’s regulated broker-dealer subsidiaries as regulatory capital.  This allows IBG LLC to take advantage of market opportunities when they arise, while maintaining substantial excess regulatory capital.  The financial covenants contained in this credit facility are as follows:

• minimum consolidated shareholders’ equity, as defined, of $3.625 billion, with quarterly increases equal to 25% of positive consolidated net income;

• maximum total debt to capitalization ratio of 30%;

• minimum liquidity ratio of 1.0 to 1.0; and

• maximum total debt to net regulatory capital ratio of 35%.

At March 31, 2012 and December 31, 2011, no borrowings were outstanding under this credit facility and IBG LLC was in compliance with all of the covenants.  At maturity, subject to meeting certain terms of the facility, the Company will have an option to convert the facility to a one-year term loan.

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Collateralized Transactions

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Collateralized Transactions

7. Collateralized Transactions

The Company enters into securities borrowing and lending transactions and agreements to repurchase and resell securities to finance trading inventory, to obtain securities for settlement and to earn residual interest rate spreads.  In addition, the Company’s customers pledge their securities owned to collateralize margin loans.  Under these transactions, the Company either receives or provides collateral, including equity, corporate debt and U.S. government securities.  Under many agreements, the Company is permitted to sell or repledge securities received as collateral and use these securities to secure repurchase agreements, enter into securities lending transactions or deliver these securities to counterparties to cover short positions.

 The Company also engages in securities financing transactions with and for customers through margin lending.  Under these agreements and transactions, the Company either receives or provides collateral, including U.S. government securities, corporate debt and equity securities.  Customer receivables generated from margin lending activity are collateralized by customer-owned securities held by the Company.  Customers’ required margin levels and established credit limits are monitored continuously by risk

management staff using automated systems.  Pursuant to Company policy and as enforced by such systems, customers are required to deposit additional collateral or reduce positions, when necessary to avoid automatic liquidation of positions.

Margin loans are extended on a demand basis and are not committed facilities.  Factors considered in the acceptance or rejection of margin loans are the amount of the loan, the degree of leverage being employed in the account and an overall evaluation of the portfolio to ensure proper diversification or, in the case of concentrated positions, appropriate liquidity of the underlying collateral.  Additionally, transactions relating to concentrated or restricted positions are limited or prohibited by raising the level of required margin collateral (to 100% in the extreme case).  Underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations.  Adherence to the Company’s collateral policies significantly limits the Company’s credit exposure to margin loans in the event of a customer’s default.  Under margin lending agreements, the Company may request additional margin collateral from customers and may sell securities that have not been paid for or purchase securities sold but not delivered from customers, if necessary.  At March 31, 2012 and December 31, 2011, approximately $8.5 billion and $7.0 billion, respectively, of customer margin loans were outstanding.

Amounts relating to collateralized transactions at March 31, 2012 and December 31, 2011 are summarized as follows:

			March 31, 2012				December 31, 2011
			Securities		Securities		Securities		Securities
			Received as		Received and		Received as		Received and
			Collateral		Repledged		Collateral		Repledged
Securities lending transactions		$	3,077,123	$	3,054,092	$	2,670,232	$	2,656,879
Agreements to resell (1)			3,612,318		3,612,318		4,173,502		4,173,502
Customer margin securities			11,816,235		972,343		9,797,275		852,739
		$	18,505,676	$	7,638,753	$	16,641,009	$	7,683,120
(1)	At March 31, 2012, $3.3 Billion or 90% (at December 31, 2011, $3.8 Billion or 91%) of securities aquired through agreements to resell have been deposited in a separate bank account for the exclusive benefit of customers in accordance with SEC Rule 15c3-3.

In the normal course of business, the Company pledges qualified securities with clearing organizations to satisfy daily margin and clearing fund requirements.  At March 31, 2012, substantially all government obligations owned were pledged to clearing organizations.

Financial instruments owned and pledged, where the counterparty has the right to repledge, at March 31, 2012 and December 31, 2011 consisted of the following:

		March 31,		December 31,
		2012		2011
Stocks	$	1,816,125	$	1,373,990
Corporate and municipal bonds		6,449		4,402
U.S. and foreign government obligations		208,643		167,415
	$	2,031,217	$	1,545,807

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Senior Notes Payable

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Senior Notes Payable

8. Senior Notes Payable

At March 31, 2012 and December 31, 2011, IBG LLC had $30,238 and $101,411, respectively, of senior notes outstanding.  Senior notes have a 3% per annum interest rate.  All outstanding senior notes have an 18-month maturity.  IBG LLC may, solely at its option, redeem the senior notes at any time on or after a specified date in the third month or the sixth month, respectively, after the date on which the senior notes are issued and sold (the “Optional Redemption Date”), at a redemption price equal to 100% of the principal amount of the senior notes to be redeemed plus accrued interest.

In January 2012, the Company decided to discontinue the Senior Notes Program.  It is the Company’s intention that no new Senior Notes will be issued and all Senior Notes outstanding as of March 31, 2012 will be redeemed by June 2012.

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Defined Contribution and Employee Incentive Plans

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Employee Incentive Plans

10. Employee Incentive Plans

Return on Investment Dollar Units (“ROI Dollar Units”)

From 1998 through January 1, 2006, IBG LLC granted all non-member employees ROI Dollar Units, which are redeemable under the amended provisions of the plan, and in accordance with regulations issued by the Internal Revenue Service (Section 409A of the Internal Revenue Code).  Upon redemption, the grantee is entitled to accumulated earnings on the face value of the certificate, but not the actual face value.  For grants made in 1998 and 1999, grantees may redeem the ROI Dollar Units after vesting on the fifth anniversary of the date of their grant and prior to the tenth anniversary of the date of their grant.  For grants made between January 1, 2000 and January 1, 2005, grantees must elect to redeem the ROI Dollar Units upon the fifth, seventh or tenth anniversary date.  These ROI Dollar Units will vest upon the fifth anniversary of the date of their grant and will continue to accumulate earnings until the elected redemption date.  For grants made on or after January 1, 2006, all ROI Dollar Units shall vest on the fifth anniversary date of their grant and will be automatically redeemed.  Subsequent to the IPO, no additional ROI Dollar Units have been or will be granted, and non-cash compensation to employees will consist primarily of grants of shares of Common Stock as described below under “2007 Stock Incentive Plan.”

As of March 31, 2012 and December 31, 2011, payables to employees for ROI Dollar Units were $9,296 and $10,088, respectively, all of which were vested.  These amounts are included in accounts payable, accrued expenses and other liabilities in the unaudited condensed consolidated statements of financial condition.  Compensation expense for the ROI Dollar Unit plan, included in the unaudited condensed consolidated statements of comprehensive income was $115 and $1,008 for the three months ended March 31, 2012 and 2011 respectively.

2007 ROI Unit Stock Plan

In connection with the IPO, IBG, Inc. adopted the Interactive Brokers Group, Inc. 2007 ROI Unit Stock Plan (the “ROI Unit Stock Plan”).  Under this plan, certain employees of the Group who held ROI Dollar Units, at the employee’s option, elected to invest their ROI Dollar Unit accumulated earnings as of December 31, 2006 in shares of Common Stock.  An aggregate of 1,271,009 shares of Common Stock (consisting of 1,250,000 shares issued under the ROI Unit Stock Plan and 21,009 shares under the 2007 Stock Incentive Plan, as described below), with a fair value at the date of grant of $38,143, were issued to IBG LLC, to be held as Treasury stock, to be distributed to employees in accordance with the following schedule, subject to the conditions below:

• 10% on the date of the IPO (or on the first anniversary of the IPO, in the case of U.S. ROI Unit holders who made the above-referenced elections after December 31, 2006); and

• an additional 15% on each of the first six anniversaries of the date of the IPO, assuming continued employment with IBG, Inc. and compliance with other applicable covenants.

Of the fair value at the date of grant, $17,806 represented the accumulated ROI Dollar Unit value elected to be invested by employees in Common Stock and such amount was accrued for as of December 31, 2006.  The remainder is being ratably accrued as compensation expense by the Company from the date of the IPO over the requisite service period represented by the aforementioned distribution schedule.  Compensation expense for the 2007 ROI Unit Stock Plan and related grants under the 2007 Stock Incentive Plan, net of the effect of forfeitures, included in the unaudited condensed consolidated statements of comprehensive income for the three months ended March 31, 2012 and 2011 was $880 and $893 respectively.  Estimated future compensation costs for unvested awards at March 31, 2012 are $5.3 million.

2007 Stock Incentive Plan

Under the Interactive Brokers Group, Inc. 2007 Stock Incentive Plan (the “Stock Incentive Plan” or “SIP”), up to 20.0 million shares of Common Stock may be granted and issued to directors, officers, employees, contractors and consultants of IBG, Inc. and its subsidiaries.  The purpose of the Stock Incentive Plan is to promote IBG, Inc.’s long-term financial success by attracting, retaining and rewarding eligible participants.

The Stock Incentive Plan is administered by the Compensation Committee of IBG, Inc.’s Board of Directors.  The Compensation Committee has discretionary authority to determine which employees are eligible to participate in the Stock Incentive Plan and establishes the terms and conditions of the awards, including the number of awards granted to each employee and all other terms and conditions applicable to such awards in individual grant agreements.  Awards are expected to be made primarily through grants of Common Stock.  Stock Incentive Plan awards are subject to issuance over time and may be forfeited upon an employee’s termination of employment or violation of certain applicable covenants prior to issuance, unless determined otherwise by the Compensation Committee.

The Stock Incentive Plan provides that, upon a change in control, the Compensation Committee may, at its discretion, fully vest any granted but unissued shares of Common Stock awarded under the Stock Incentive Plan, or provide that any such granted but unissued shares of Common Stock will be honored or assumed, or new rights substituted therefore by the new employer on a substantially similar basis and on terms and conditions substantially comparable to those of the Stock Incentive Plan.

IBG, Inc. granted awards of Common Stock in connection with the IPO and is expected to continue to grant awards on or about December 31 of each year following the IPO, to eligible employees as part of an overall plan of equity compensation.  Shares of Common Stock granted are distributable to employees in accordance with the following schedule:

• 10% on the first vesting date, which approximates the anniversary of the IPO; and

• an additional 15% on each of the following six anniversaries of the first vesting, assuming continued employment with IBG, Inc. and compliance with non-competition and other applicable covenants.

Shares granted to external directors vest, and are distributed, over a five-year period (20% per year) commencing one year after the date of grant.  14,940 shares have been granted to the external directors cumulatively since the IPO.

Stock Incentive Plan share grants (excluding 21,009 shares issued pursuant to the 2007 ROI Unit Stock Plan above) and the related fair values at the date of grant were:

	Shares		Fair Value at Date of Grant ($000's)
In connection with IPO	927,943	$	27,847
July 31, 2007	16,665		404
December 31, 2007	1,055,206		32,876
December 31, 2008	2,065,432		35,600
December 31, 2009	2,448,031		42,796
December 31, 2010	2,513,738		43,255
December 31, 2011	3,411,613		50,753
January 6, 2012	1,215,866		18,411
	13,654,494	$	251,942

On January 6, 2012, an additional one-time grant was awarded to employees.  This additional grant, which is reported in the table above, is subject to the same terms and conditions as other employee SIP grants.

The following is a summary of Stock Plan activity for the period from January 1 through March 31, 2012:

	Shares
	2007 Stock		2007 ROI Unit
	Incentive Plan		Stock Plan
Balance, December 31, 2011	9,408,994		356,149
Granted	1,215,866		-
Forfeited	(51,666	)	(327	)
Distributed	(2,662	)	(431	)
Balance, March 31, 2012	10,570,532		355,391

Estimated future grants under the Stock Incentive Plan are being accrued for ratably during each year under the ASC 718 “Graded Vesting” method.  Based upon the forfeiture provisions of the Stock Incentive Plan, ASC 718 requires the Company to expense 50% of the grant date value of SIP awards in the year of grant, in addition to expensing the remainder of the grant value over the seven-year service period attributable to each grant.  Compensation expense recognized in the unaudited condensed consolidated statements of comprehensive income for the three months ended March 31, 2012 and 2011 were $19,625 and $9,574, respectively.  Estimated future compensation costs for unvested awards at March 31, 2012 are $48.2 million.

Shares granted under the ROI Unit Stock Plan and the Stock Incentive Plan are subject to forfeiture in the event an employee ceases employment with the Company.  The plans provide that employees who discontinue employment with the Company without cause and continue to meet the terms of the plans’ post-employment provisions will forfeit 50% of unvested previously granted shares unless the employee is over the age of 59, in which case the employee would be eligible to receive 100% of unvested shares previously granted.  Distributions of remaining shares granted on or before January 1, 2009 to former employees will occur within 90 days of the anniversary of the termination of employment date over a five (5) year vesting schedule, 12.5% in each of the first four years and 50% in the fifth year.  Distributions of remaining shares granted on or after January 1, 2010 to former employees will occur over the remaining vesting schedule applicable to each grant.  Through March 31, 2012, a total of 22,462 shares have been distributed under these post-employment provisions.  These distributions are included in the Stock Plans activity tables above.

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Significant Accounting Policies (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2011	Mar. 31, 2012	Dec. 31, 2011	May 03, 2007
Significant accounting policies
Over 59 percent of shares eligible				100.00%
Percent of shares forfeited post employment				50.00%
FDIC Insured Corporate Bonds		$ 414,700	$ 440,400
U.S. Treasury Bills		1,447,400	747,900
Securities Purchased Under Agreement to Resell Segregated for Regulatory Purposes		$ 3,300,000	$ 3,800,000
Property and equipment useful lives	Depreciation and amortization are computed using the straight-line method.  Equipment is depreciated over the estimated useful lives of the assets, while leasehold improvements are amortized over the lesser of the estimated economic useful life of the asset or the term of the lease.  Computer equipment is depreciated over three to five years and office furniture and equipment are depreciated over five to seven years.  Qualifying costs for internally developed software are capitalized and amortized over the expected useful life of the developed software, not to exceed three years.

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Segment and Geographic Information Geographic Table (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net revenues	$ 303,922	$ 367,888
Income before income taxes	149,677	221,972
United States
Net revenues	232,416	257,608
Income before income taxes	134,635	176,448
International
Net revenues	70,571	108,370
Income before income taxes	15,915	48,170
Geographic corporate and eliminations
Net revenues	935	1,910
Income before income taxes	$ (873)	$ (2,646)

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Related Party Transactions

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Related Party Transactions

15. Related Party Transactions

Receivable from affiliate represents amounts advanced to IBG Holdings LLC and payable to affiliate represents amounts payable to IBG Holdings LLC under the Tax Receivable Agreement (Note 4).

Included in receivable from and payable to customers in the accompanying unaudited condensed consolidated statements of financial condition as of March 31, 2012 and December 31, 2011 were account receivables of directors, officers and their affiliates of $1,345 and $1,291 and payables of $438,637 and $510,623, respectively, arising from the normal course of business as brokerage customers of the Company.

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Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Comprehensive Income Table

			Three months ended
			March 31,
				2012		2011
	Net income attributable to common stockholders		$	11,084	$	16,251
	Add net income attributable to non-fair value redemption rights			1,239		405
	Net income available for common stockholders			12,323		16,656
	Other comprehensive income:
		Cumulative translation adjustment, before income taxes		4,110		2,005
		Income taxes related to items of other comprehensive income		1,484		737
	Other comprehensive income, net of tax			2,626		1,268
	Comprehensive income available for common stockholders		$	14,949	$	17,924
Earnings per share on comprehensive income:
		Basic	$	0.33	$	0.42
		Diluted	$	0.33	$	0.42
	Weighted average common shares outstanding:
		Basic		45,576,925		42,231,651
		Diluted		45,951,464		42,791,822

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Defined Contribution and Employee Incentive Plan SIP Grants Table (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	59 Months Ended
	Mar. 31, 2012	Jan. 06, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Jul. 31, 2007	May 03, 2007
SIP Share Grants
Shares granted		1,215,866	3,411,613	2,513,738	2,448,031	2,065,432	1,055,206	16,665	927,943
Fair Value - Date of Grant ($000's)		$ 18,411	$ 50,753	$ 43,255	$ 42,796	$ 35,600	$ 32,876	$ 404	$ 27,847
Shares Granted IPO to Date	13,654,494
Fair Value - Date of Grant ($000's) IPO to Date	$ 251,942

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Fair Value Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair value [Abstract]
PIIGS Sovereign Debt	$ 0	$ 0

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Condensed Consolidated Statements of Cash Flows (As Restated, Note 17) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 140,943	$ 203,240
Adjustments to reconcile net income to net cash used in operating activities:
Translation gains	(11,111)	(15,655)
Deferred income taxes	1,791	9,514
Depreciation and amortization	5,193	4,946
Employee stock plan compensation	20,579	10,467
Losses (gains) on non-market making investments, net	1,009	(3,261)
Bad debt expense and other	17	264
Change in operating assets and liabilities:
Increase in cash and securities - segregated for regulatory purposes	(958,810)	(368,542)
Increase in securities borrowed	(419,838)	(30,921)
Decrease in securities purchased under agreements to resell	10,125	11,291
Decrease in trading assets	184,646	1,019,213
Increase in receivables from customers	(1,436,050)	(2,313,260)
Decrease (increase) in other receivables	207,718	(5,864)
Decrease (increase) in other assets	(2,806)	7,646
Decrease in trading liabilities	(471,665)	(782,276)
Increase (decrease) in securities loaned	383,369	(139,948)
Increase in payable to customers	2,195,191	2,346,102
Increase in other payables	95,769	10,307
Net cash used in operating activities	(53,930)	(36,737)
Cash flows from investing activities:
Purchases of non-market making investments	(64,705)	(39,737)
Sales of non-market making investments	57,828	7,916
Distribution received from equity investments	1,567	0
Purchase of property and equipment	(5,176)	(3,167)
Net cash used in investing activities	(10,486)	(34,988)
Cash flows from financing activities:
Dividends paid to common shareholders	(4,557)	0
Dividends paid to non-controlling interests	(34,993)	0
Redemption of former member interest	0	(816)
Issuance of senior notes	0	143,704
Redemptions of senior notes	(71,173)	(137,418)
Repayments of senior secured credit facility	0	(100,000)
Increase (decrease) in short-term borrowings, net	7,615	(18,777)
Net cash used in financing activities	(103,108)	(113,307)
Effect of exchange rate changes on cash and cash equivalents	23,428	6,973
Net decrease in cash and cash equivalents	(144,096)	(178,059)
Cash and cash equivalents at beginning of period	1,695,495	1,354,219
Cash and cash equivalents at end of period	1,551,399	1,176,160
Supplemental disclosures of cash flow information:
Cash paid for interest	18,585	18,029
Cash paid for taxes	6,239	32,772
Non-cash financing activities:
Adjustments to Additional Paid-in Capital for changes in proportionate ownership in IBG LLC	(38)	0
Adjustments to Non-Controlling Interests for changes in proportionate ownership in IBG LLC	38	0
Changes in redemption value of redeemable noncontrolling interests	726,601	(684,581)
Changes to total equity (deficit) for the change in the redemption value of redeemable noncontrolling interests	$ (726,601)	$ 684,581

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Equity and Earnings Per Share

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Equity and Earnings Per Share

4. Equity and Earnings Per Share

In connection with its IPO in May 2007, IBG, Inc. purchased 10.0% of the membership interests in IBG LLC from IBG Holdings LLC, became the sole managing member of IBG LLC and began to consolidate IBG LLC’s financial results into its financial statements.  IBG Holdings LLC wholly owns all Class B common stock, which common stock has voting rights in proportion to its ownership interests in IBG LLC, approximately 88.5% as of March 31, 2012.  The unaudited condensed consolidated financial statements reflect the results of operations and financial position of IBG, Inc., including consolidation of its investment in IBG LLC, and IBG Holdings LLC’s ownership interests in IBG LLC are accounted for and reported in these consolidated financial statements as “redeemable noncontrolling interests” (temporary equity) pursuant to ASC 810-10-45, ASC 815-40-25 and ASC 480-10-S99-3A (see Note 17 to the unaudited condensed consolidated financial statements ).

Recapitalization and Post-IPO Capital Structure

Immediately prior to and immediately following the consummation of the IPO, IBG, Inc., IBG Holdings LLC, IBG LLC and the members of IBG LLC consummated a series of transactions collectively referred to herein as the “Recapitalization.” In connection with the Recapitalization, IBG, Inc., IBG Holdings LLC and the historical members of IBG LLC entered into an exchange agreement, dated as of May 3, 2007 (the “Exchange Agreement”), pursuant to which the historical members of IBG LLC received membership interests in IBG Holdings LLC in exchange for their membership interests in IBG LLC.  Additionally, IBG, Inc. became the sole managing member of IBG LLC.

In connection with the consummation of the IPO, IBG Holdings LLC used the net proceeds to redeem 10.0% of members’ interests in IBG Holdings LLC in proportion to their interests.  Immediately following the Recapitalization and IPO, IBG Holdings LLC owned approximately 90% of IBG LLC and 100% of IBG, Inc.’s Class B common stock, which has voting power in IBG, Inc. proportionate to the extent of IBG Holdings LLC’s ownership of IBG LLC.

                Since consummation of the IPO and Recapitalization, IBG, Inc.’s equity capital structure has been comprised of Class A and Class B common stock.  All shares of common stock have a par value of $0.01 per share and have identical rights to earnings and dividends and in liquidation.  As described previously in this Note 4, Class B common stock has voting power in IBG, Inc. proportionate to the extent of IBG Holdings LLC’s ownership of IBG LLC.  At March 31, 2012 and December 31, 2011, 1,000,000,000 shares of Class A common stock were authorized, of which 46,063,918 and 46,061,256 shares have been issued; and 45,579,884 and 45,576,791 shares were outstanding, respectively.  Class B common stock is comprised of 100 authorized shares, of which 100 shares were issued and outstanding as of March 31, 2012 and December 31, 2011, respectively.  In addition, 10,000 shares of preferred stock have been authorized, of which no shares are issued or outstanding as of March 31, 2012 and December 31, 2011, respectively.

As a result of a federal income tax election made by IBG LLC applicable to the acquisition of IBG LLC member interests by IBG, Inc., the income tax basis of the assets of IBG LLC acquired by IBG, Inc. have been adjusted based on the amount paid for such interests.  Deferred tax assets were recorded as of the IPO date and in connection with the 2011 redemption of IBGH member interests in exchange for Common Stock, which deferred tax assets are a component of Other Assets in the unaudited condensed consolidated statement of financial condition and are being amortized as additional deferred income tax expense over 15 years from the IPO date and from the 2011 redemption date, respectively, as allowable under current tax law.  As of March 31, 2012 and December 31, 2011, the unamortized balance of these deferred tax assets was $293,057 and, $297,881, respectively.

IBG, Inc. also entered into an agreement (the “Tax Receivable Agreement”) with IBG Holdings LLC to pay IBG Holdings LLC (for the benefit of the former members of IBG LLC) 85% of the tax savings that IBG, Inc. actually realizes as the result of tax basis increases.  These payables, net of payments made to IBGH, are reported as Payable to Affiliate in the unaudited condensed consolidated statement of financial condition.

The remaining 15% is accounted for as a permanent increase to additional paid-in capital in the unaudited condensed consolidated statement of financial condition.

The deferred tax assets, payables to IBGH and credits to additional paid in capital arising from stock offerings through March 31, 2012 are:

		Deferred Tax Assets		Payable to IBGH		Additional Paid In Capital
May 3, 2007 (IPO)	$	380,785	$	323,668	$	57,117
August 4, 2011		2,984		2,536		448
	$	383,769	$	326,204	$	57,565

Amounts received and payable under the Tax Receivable Agreement are payable to IBG Holdings LLC annually upon the filing of IBG, Inc.’s federal income tax return.  The Company has paid IBG Holdings LLC a total of $54.6 million through March 31, 2012 pursuant to the terms of the Tax Receivable Agreement.

The Exchange Agreement also provides for future redemptions of member interests and for the purchase of member interests in LLC by IBG, Inc. from Holdings, which could result in IBG, Inc. acquiring the remaining member interests in LLC that it does not own. On an annual basis, holders of Holdings member interests are able to request redemption of such member interests over a minimum eight (8) year period following the IPO; 12.5% annually for seven (7) years and 2.5% in the eighth year.

At the time of the Company’s IPO in 2007, three hundred sixty (360) million shares of authorized common stock were reserved for future sales and redemptions. From 2008 through 2010, redemptions totaling $114 million were funded using cash on hand at LLC. In 2011, the Company issued 1,983,624 shares of Common Stock directly to Holdings in exchange for an equivalent number of shares of member interests in LLC.

As a consequence of these redemption transactions, and distribution of shares to employees (Note 10), IBG, Inc.’s interest in LLC has increased to approximately 11.5%, with Holdings owning the remaining 88.5% as of March 31, 2012.  The redemptions also resulted in an increase in the Holdings interest held by Thomas Peterffy and his affiliates from approximately 84.6% at the IPO to approximately 86.3% at March 31, 2012.

The Exchange Agreement, as amended June 6, 2012, provides that the Company may facilitate the redemption by Holdings of interests held by its members through the issuance of shares of Common Stock through a public offering in exchange for the interests in LLC being redeemed by Holdings. The June 6, 2012 amendment (the “Amendment”) eliminated from the Exchange Agreement an alternative funding method, which provided that upon approval by the board of directors and by agreement of the Company, LLC and Holdings, redemptions could be made in cash.

Stock Repurchase Program

In September 2008, the Company’s Board of Directors approved the repurchase of up to eight (8) million shares of its Class A common stock by LLC.  Shares may be purchased from time to time in the open market and in private transactions if the Company deems the price appropriate.  In November 2008, 65,800 shares were repurchased at a cost of $866, and are being held as Treasury Stock.

Earnings Per Share

The Company has determined to reflect measurement adjustments for non-fair value redemption rights through application of the two-class method of calculating earnings per share in lieu of recognizing the impact through the determination of net income attributable to common stockholders.

Basic earnings per share are calculated utilizing net income available for common stockholders divided by the weighted average number of shares of Class A and Class B common stock outstanding for that period (as restated):

				Three months ended
				March 31,
			2012		2011
Basic earnings per share:
Net income attributable to common stockholders			$	11,084	$	16,251
Add net income attributable to non-fair value redemption rights				1,239		405
	Net income available for common stockholders - Basic		$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A		45,576,825		42,231,551
		Class B		100		100
				45,576,925		42,231,651
	Basic earnings per share		$	0.27	$	0.39

Diluted earnings per share are calculated utilizing the Company’s basic net income available for common stockholders divided by diluted weighted average shares outstanding with no adjustments to net income available to common stockholders for potentially dilutive common shares (as restated):

 

						Three months ended
						March 31,
					2012			2011
Diluted earnings per share:
	Net income available for common stockholders - Basic				$	12,323	$	16,656
	Adjustments for potentially dilutive common shares					-		-
	Net income available for common stockholders - Diluted				$	12,323	$	16,656
	Weighted average shares of common stock outstanding:
		Class A:
			Issued and outstanding			45,576,825		42,231,551
			Potentially dilutive common shares:
				Issuable pursuant to 2007 ROI Unit Stock Plan		374,539		560,171
		Class B				100		100
						45,951,464		42,791,822
	Diluted earnings per share				$	0.27	$	0.39

      Potentially dilutive common shares could include unvested shares awarded under the SIP.  During the three months ended March 31, 2012 and 2011, the additional shares of Common Stock attributable to the SIP that would have been assumed to be issued, as calculated under the Treasury Stock method, were anti-dilutive and, accordingly, have been excluded from the calculation of diluted earnings per share.

Member and Stockholder Dividends

In March 2012, IBG LLC paid dividends to its members totaling $39.5 million, of which IBG, Inc.’s proportionate share was $4.6 million.  Also in March 2012, the Company paid a quarterly cash dividend of $0.10 per share of Common Stock, totaling $4.6 million.

On April 17, 2012, the Company declared a cash dividend of $0.10 per common share, payable on June 14, 2012 to shareholders of record as of June 1, 2012.

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Restatement Earnings Per Share (Detail) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Restatement [Abstract]
Basic earnings per share - as reported in respective years' initial filings	0.24	0.38
Adjustments to give effect to assument redemptions - Basic	$ 0.03	$ 0.01
Basic	$ 0.27	$ 0.39
Diluted earnings per share - as reported in respective years' initial filings	0.24	0.38
Adjustments to give effect to assument redemptions - Diluted	$ 0.03	$ 0.01
Diluted	$ 0.27	$ 0.39

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Fair Value (Tables)

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Fair Value Table

		Financial Assets At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	1,447,406	$	414,742	$	-	$	1,862,148
Financial instruments owned:
	Stocks		360,790		-		-		360,790
	Options		3,728,623		-		-		3,728,623
	U.S. and foreign government obligations		10,192		-		-		10,192
	Warrants		122,960		-		-		122,960
	Corporate and municipal bonds		51,179		60,904		-		112,083
	Discount certificates		76,993		-		-		76,993
	Currency forward contracts		-		764		-		764
			4,350,737		61,668		-		4,412,405
Financial instruments owned and pledged as collateral:
	Stocks		1,816,125		-		-		1,816,125
	Corporate and municipal bonds		6,449		-		-		6,449
	U.S. and foreign government obligations		208,643		-		-		208,643
			2,031,217		-		-		2,031,217
			6,381,954		61,668		-		6,443,622
Other assets - investments in non-market making securities
	Investments in common stock		3,504		-		-		3,504
	Investments in other non-market making securities		1,295		97,462		-		98,757
		$	7,834,159	$	573,872	$	-	$	8,408,031

		Financial Liabilities At Fair Value as of March 31, 2012
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,636,238	$	-	$	-	$	1,636,238
	Options		3,911,436		-		-		3,911,436
	Warrants		583		-		-		583
	Corporate bonds		65,758		58,000		-		123,758
	Currency forward contracts		-		2,445		-		2,445
		$	5,614,015	$	60,445	$	-	$	5,674,460

		Financial Assets At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Securities segregated for regulatory purposes		$	747,857	$	440,408	$	-	$	1,188,265
Financial instruments owned:
	Stocks		671,881		-		-		671,881
	Options		4,113,539		-		-		4,113,539
	U.S. and foreign government obligations		10,908		-		-		10,908
	Warrants		113,603		-		-		113,603
	Corporate and municipal bonds		36,587		60,501		-		97,088
	Discount certificates		60,675		-		-		60,675
	Currency forward contracts		-		1,577		-		1,577
			5,007,193		62,078		-		5,069,271
Financial instruments owned and pledged as collateral:
	Stocks		1,373,990		-		-		1,373,990
	Corporate and municipal bonds		4,402		-		-		4,402
	U.S. and foreign government obligations		167,415		-		-		167,415
			1,545,807		-		-		1,545,807
			6,553,000		62,078		-		6,615,078
Other assets - investments in non-market making securities
	Investments in common stock		3,782		-		-		3,782
	Investments in other non-market making securities		1,260		89,472		-		90,732
		$	7,305,899	$	591,958	$	-	$	7,897,857
		Financial Liabilities At Fair Value as of December 31, 2011
			Level 1		Level 2		Level 3		Total
Financial instruments sold, not yet purchased:
	Stocks	$	1,796,160	$	-	$	-	$	1,796,160
	Options		4,233,533		-		-		4,233,533
	Warrants		240		-		-		240
	Corporate bonds		61,166		61,511		-		122,677
	Currency forward contracts		-		3,538		-		3,538
		$	6,091,099	$	65,049	$	-	$	6,156,148

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Equity and Earnings Per Share Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended			3 Months Ended		36 Months Ended	59 Months Ended
	Apr. 17, 2012	Aug. 31, 2011	Nov. 28, 2008	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2010	Mar. 31, 2012	Dec. 31, 2011	Aug. 04, 2011	Sep. 26, 2008	May 03, 2007
Equity and earnings per share
IBG Inc. ownership % of IBG LLC				11.50%			11.50%		11.50%		10.00%
IBG Holdings ownership % of IBG LLC				88.50%			88.50%	88.50%	88.50%		90.00%
IBG Holdings Redemption of IBG LLC											10.00%
IBG Holdings LLC Owernship Percentage of Class B Common Stock											100.00%
Exchange Agreement Future Redemption Schedule							12.5% annually for seven (7) years and 2.5% in the eighth year.
Shares Issued		1,983,624
Fair value membership interests						$ 114,000
Shares reserved for future issuance											360,000,000
Thomas Peterffy and Affiliates Ownership				86.30%			86.30%				84.60%
Preferred stock shares authorized				10,000			10,000	10,000
Preferred stock shares issued				0			0	0
Preferred stock shares outstanding				0			0	0
Deferred tax asset from common stock offerings				293,057			293,057	297,881			380,785
Amortization period DTA (years)								15
Percent of Tax Savings Owed to IBG Holdings LLC				85.00%			85.00%
Tax savings paid to IBG Holdings LLC							54,600
Percentage of tax savings retained by IBG Inc.				15.00%			15.00%
Class A common stock authorized to be repurchased (shares)										8,000,000
Treasury stock shares acquired			65,800
Treasury stock acquired cost			866
Dividends paid by IBG LLC				39,500
Cash dividend paid to IBG, Inc.				4,557
Dividend per share				$ 0.10
Dividends paid to common shareholders				$ 4,557	$ 0
Dividend declared	$ 0.10
Declaration Date	Apr. 17, 2012
Record Date	Jun. 01, 2012
Payment Date	Jun. 14, 2012
Common Class A
Equity and earnings per share
Common stock, par value				$ 0.01			$ 0.01	$ 0.01
Shares authorized				1,000,000,000			1,000,000,000	1,000,000,000
Shares issued				46,063,918			46,063,918	46,061,256
Common stock, shares outstanding				45,579,884			45,579,884	45,576,791
Common Class B
Equity and earnings per share
Common stock, par value				$ 0.01			$ 0.01	$ 0.01
Shares authorized				100			100	100
Shares issued				100			100	100
Common stock, shares outstanding				100			100	100

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Regulatory Requirements

3 Months Ended

Mar. 31, 2012

Notes to Consolidated Financial Statements

Regulatory Requirements

14. Regulatory Requirements

At March 31, 2012, aggregate excess regulatory capital for all of the Operating Companies was $2.7 billion.

TH LLC and IB LLC are subject to the Uniform Net Capital Rule (Rule 15c3-1) under the Exchange Act and the CFTC’s minimum financial requirements (Regulation 1.17), and THE is subject to the Swiss National Bank eligible equity requirement.  Additionally, THSHK is subject to the Hong Kong Securities Futures Commission liquid capital requirement, THA is subject to the Australian Stock Exchange liquid capital requirement, THC and IBC are subject to the Investment Industry Regulatory Organization of Canada risk adjusted capital requirement, IBUK is subject to the U.K. Financial Services Authority financial resources requirement, IBI is subject to the National Stock Exchange of India net capital requirements and IBSJ is subject to the Japanese Financial Supervisory Agency capital requirements. The following table summarizes capital, capital requirements and excess regulatory capital (millions):

		Net Capital/ Eligible Equity		Requirement		Excess
IB LLC	$	1,420	$	197	$	1,223
TH LLC		737		41		696
THE		622		224		398
Other regulated Operating Companies		418		21		397
	$	3,197	$	483	$	2,714

At March 31, 2012, all of the regulated Operating Companies were in compliance with their respective regulatory capital requirements.

Regulatory capital requirements could restrict the Operating Companies from expanding their business and declaring dividends if their net capital does not meet regulatory requirements.  Also, certain entities within IBG, Inc. are subject to other regulatory restrictions and requirements.