The Duke Energy Registrants classify their investments in debt and equity securities as either trading or available-for-sale.

Investments in debt and equity securities held in Grantor Trusts associated with certain deferred compensation plans and certain other investments are classified as trading securities. The fair value of these investments was $19 million at March 31, 2014 and $18 million at December 31, 2013.

All other investments in debt and equity securities are classified as available-for-sale securities.

Duke Energy's available-for-sale securities are primarily comprised of investments held in (i) the NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) grantor trusts at Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana related to OPEB plans (iii) Duke Energy's captive insurance investment portfolio, and (iv) Duke Energy's foreign operations investment portfolio.

Duke Energy holds corporate debt securities that were purchased using excess cash from its foreign operations. These investments are either classified as Cash and cash equivalents or Short-term investments on the Condensed Consolidated Balance Sheet based on maturity date and are available for current operations of Duke Energy's foreign business. The fair value of these investments classified as Short-term investments was $6 million as of March 31, 2014 and $44 million as of December 31, 2013.

Duke Energy classifies all other investments in debt and equity securities as long-term, unless otherwise noted.

The investments within the NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida and the Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana grantor trusts (Investment Trusts) are managed by independent investment managers with discretion to buy, sell, and invest pursuant to the objectives set forth by the trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized gains and losses associated with debt and equity securities within the Investment Trusts are considered other-than-temporary impairments and are recognized immediately. Pursuant to regulatory accounting, substantially all realized and unrealized gains and losses associated with investments within the Investment Trusts are deferred as a regulatory asset or liability. As a result, there is no immediate impact on earnings of the Duke Energy Registrants.

Unrealized gains and losses on all other available-for-sale securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment is other-than-temporarily impaired. If an other-than-temporary impairment exists, the unrealized loss may be included in earnings based on the criteria discussed below.

The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value should be considered other-than-temporary. Criteria used to evaluate whether an impairment associated with equity securities is other-than-temporary includes, but is not limited to, (i) the length of time over which the market value has been lower than the cost basis of the investment, (ii) the percentage decline compared to the cost of the investment, and (iii) management's intent and ability to retain its investment for a period of time sufficient to allow for any anticipated recovery in market value. If a decline in fair value is determined to be other-than-temporary, the investment is written down to its fair value through a charge to earnings.

If the entity does not have an intent to sell a debt security and it is not more likely than not management will be required to sell the debt security before the recovery of its cost basis, the impairment write-down to fair value would be recorded as a component of other comprehensive income, except for when it is determined a credit loss exists. In determining whether a credit loss exists, management considers, among other things, (i) the length of time and the extent to which the fair value has been less than the amortized cost basis, (ii) changes in the financial condition of the issuer of the security, or in the case of an asset backed security, the financial condition of the underlying loan obligors, (iii) consideration of underlying collateral and guarantees of amounts by government entities, (iv) ability of the issuer of the security to make scheduled interest or principal payments, and (v) any changes to the rating of the security by rating agencies. If a credit loss exists, the amount of impairment write-down to fair value is split between credit loss and other factors. The amount related to credit loss is recognized in earnings. The amount related to other factors is recognized in other comprehensive income. There were no credit losses as of March 31, 2014 and December 31, 2013. There were no other-than-temporary impairments for debt or equity securities as of March 31, 2014 and December 31, 2013. Other available-for-sale securities were reflected as a component of other comprehensive income in 2014 and 2013.

DUKE ENERGY

The following table presents the estimated fair value of investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	114		$	―		$	―	$	110
Equity securities				1,854			14		3,623			1,813			10		3,579
Corporate debt securities				11			3		449			8			6		400
Municipal bonds				3			3		139			2			6		160
U.S. government bonds				10			7		708			7			12		730
Other debt securities				12			1		199			22			2		154
Total NDTF			$	1,890		$	28	$	5,232		$	1,852		$	36	$	5,133
Other Investments
Cash and cash equivalents				―			―		17			―			―		21
Equity securities				30			―		92			29			―		91
Corporate debt securities				1			―		72			1			1		99
Municipal bonds				3			1		79			2			2		79
U.S. government bonds				―			―		12			―			―		17
Other debt securities				―			7		107			―			8		111
Total Other Investments^(a)			$	34		$	8	$	379		$	32		$	11	$	418
Total Investments			$	1,924		$	36	$	5,611		$	1,884		$	47	$	5,551

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

The table below summarizes the maturity date for debt securities.

(in millions)	March 31, 2014
Due in one year or less		$	59
Due after one through five years			433
Due after five through 10 years			499
Due after 10 years			774
Total		$	1,765

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.

	Three Months Ended March 31,
(in millions)			2014	2013
Realized gains		$	31	$	31
Realized losses			4		7

DUKE ENERGY CAROLINAS

The following table presents the estimated fair value of investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	70		$	―		$	―	$	42
Equity securities				1,001			8		1,982			974			6		1,964
Corporate debt securities				6			3		313			5			5		274
Municipal bonds				―			1		33			―			2		54
U.S. government bonds				4			4		309			3			7		354
Other debt securities				12			―		193			22			2		146
Total NDTF			$	1,023		$	16	$	2,900		$	1,004		$	22	$	2,834
Other Investments
Other debt securities				―			1		3			―			1		3
Total Other Investments^(a)			$	―		$	1	$	3		$	―		$	1	$	3
Total Investments			$	1,023		$	17	$	2,903		$	1,004		$	23	$	2,837

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

The table below summarizes the maturity date for debt securities.

(in millions)	March 31, 2014
Due in one year or less		$	24
Due after one through five years			165
Due after five through 10 years			305
Due after 10 years			357
Total		$	851

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.

	Three Months Ended March 31,
(in millions)			2014	2013
Realized gains		$	23	$	25
Realized losses			1		4

PROGRESS ENERGY

The following table presents the estimated fair value investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	44		$	―		$	―	$	68
Equity securities				853			6		1,641			839			4		1,615
Corporate debt securities				5			―		136			3			1		126
Municipal bonds				3			2		106			2			4		106
U.S. government bonds				6			3		399			4			5		376
Other debt securities				―			1		6			―			―		8
Total NDTF			$	867		$	12	$	2,332		$	848		$	14	$	2,299
Other Investments
Cash and cash equivalents				―			―		16			―			―		20
Municipal bonds				2			―		40			1			―		39
Total Other Investments^(a)			$	2		$	―	$	56		$	1		$	―	$	59
Total Investments			$	869		$	12	$	2,388		$	849		$	14	$	2,358

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

The table below summarizes the maturity date for debt securities.

(in millions)	March 31, 2014
Due in one year or less		$	16
Due after one through five years			212
Due after five through 10 years			136
Due after 10 years			323
Total		$	687

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.

	Three Months Ended March 31,
(in millions)			2014	2013
Realized gains		$	7	$	5
Realized losses			2		2

DUKE ENERGY PROGRESS

The following table presents the estimated fair value of investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	33		$	―		$	―	$	48
Equity securities				544			4		1,088			535			3		1,069
Corporate debt securities				4			―		87			3			1		80
Municipal bonds				3			2		104			2			4		104
U.S. government bonds				5			3		254			4			3		232
Other debt securities				―			1		3			―			―		5
Total NDTF			$	556		$	10	$	1,569		$	544		$	11	$	1,538
Other Investments
Cash and cash equivalents				―			―		―			―			―		2
Total Other Investments^(a)			$	―		$	―	$	―		$	―		$	―	$	2
Total Investments			$	556		$	10	$	1,569		$	544		$	11	$	1,540

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.

	Three Months Ended March 31,
(in millions)			2014	2013
Realized gains		$	6	$	2
Realized losses			2		1

DUKE ENERGY FLORIDA

The following table presents the estimated fair value of investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	11		$	―		$	―	$	20
Equity securities				309			2		553			304			1		546
Corporate debt securities				1			―		49			―			―		46
Municipal bonds				―			―		2			―			―		2
U.S. government bonds				1			―		145			―			2		144
Other debt securities				―			―		3			―			―		3
Total NDTF			$	311		$	2	$	763		$	304		$	3	$	761
Other Investments
Cash and cash equivalents				―			―		2			―			―		3
Municipal bonds				2			―		40			1			―		39
Total Other Investments^(a)			$	2		$	―	$	42		$	1		$	―	$	42
Total Investments			$	313		$	2	$	805		$	305		$	3	$	803

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows.

	Three Months Ended March 31,
(in millions)			2014		2013
Realized gains		$	1	$	3
Realized losses			1		1

DUKE ENERGY INDIANA

The following table presents the estimated fair value of investments in available-for-sale securities.

		March 31, 2014								December 31, 2013
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
Other Investments
Cash and cash equivalents			$	―		$	―	$	1		$	―		$	―	$	1
Equity securities				25			―		66			24			―		65
Municipal bonds				―			1		28			―			1		28
Total Other Investments^(a)			$	25		$	1	$	95		$	24		$	1	$	94
Total Investments			$	25		$	1	$	95		$	24		$	1	$	94

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.