4. Fair Value Measurements

We measure certain financial assets and liabilities at fair value on a recurring basis, and certain non-financial assets and liabilities on a nonrecurring basis. Certain non-financial assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances, such as when there is evidence of impairment. Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash and cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly.

Fair value is measured as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, a three-tier fair value hierarchy has been established, which prioritizes the inputs used in measuring fair value as follows:

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Level 1—Observable inputs, such as quoted prices in active markets;

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Level 2—Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and

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Level 3—Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. In determining fair value for recurring financial assets and liabilities, we separate our financial instruments into three categories: marketable securities, other marketable securities and loan related to other marketable securities, and derivative financial instruments. These assets and liabilities are all valued based on the market approach that uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Marketable Securities

We use a third-party provider to determine fair values of marketable securities. The third-party provider receives market prices for each marketable security from a variety of industry standard data providers, security master files from large financial institutions and other third-party sources with reasonable levels of price transparency. The third-party provider uses these multiple prices as inputs into a pricing model to determine a weighted average price for each security. Tellabs management compares the third-party pricing with pricing from outside investment managers and other market sources to ensure the third-party pricing is reasonable. We classify U.S. Treasury bills and bonds as Level 1 based upon quoted prices in active markets. All other marketable securities are classified as Level 2 based upon the other than quoted prices with observable market data. The type of instruments valued based upon the observable market data include Federal Deposit Insurance Corporation (FDIC)-backed corporate debt obligations, investment grade corporate bonds, mortgaged backed debt obligations guaranteed by the Government National Mortgage Association (GNMA), certain FDIC-backed bank certificates of deposit, foreign government debt obligations and foreign corporate debt obligations.

Other Marketable Securities and Loan Related to Other Marketable Securities

We classify holdings in other marketable securities (Cisco common stock) and the related loan as Level 1 in the fair value hierarchy. We classify these as Level 1 since they are actively traded through a governed exchange.

Derivative Financial Instruments

Our foreign currency forward contracts are executed as exchange-traded. Market participants can be described as large money center or regional banks. Exchange-traded derivatives typically fall within Level 1 or Level 2 in the fair value hierarchy depending on whether they are deemed to be actively traded or not.

We have elected to value derivatives as Level 2, using observable market data at the measurement date and standard valuation techniques to convert future amounts to a single present amount (discounted). Key inputs for currency derivatives are the spot rate, interest rates and credit derivative swap spreads. The spot rate for each currency is the same spot rate used for all balance sheet translations at the measurement date. The following values are calculated from commonly quoted intervals available from a third-party financial information provider. Forward points and LIBOR rates are used to calculate a discount rate to apply to assets and liabilities. One-year credit default swap spreads are used to discount derivative assets, all of which have final maturities of less than 12 months. We calculate the discount to the derivative liabilities to reflect the potential credit risk to lenders and have used the spread over LIBOR based on the credit risk of our counterparties. Each asset is individually discounted to reflect our potential credit risk and we have used the spread over LIBOR based on similar credit risk. We do not adjust the fair value for immaterial credit risk.

We have applied a valuation method for financial assets and liabilities and recurring non-financial assets consistently during this period and prior periods. The following table sets forth financial instruments owned at fair value by level in the fair value hierarchy. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

Assets and liabilities measured at fair value on a recurring basis are:


			Fair Value Measurements at September 28, 2012
	Balance at 9/28/12		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	152.4	$	152.4	$	—	$	—
Corporate debt obligations guaranteed by FDIC		21.1		—		21.1		—
Corporate debt obligations		188.6		—		188.6		—
Mortgaged backed debt obligations guaranteed by GNMA		97.7		—		97.7		—
Certificates of deposit guaranteed by FDIC		3.2		—		3.2		—
Foreign government debt obligations		224.7		—		224.7		—
Foreign corporate debt obligations		119.2		—		119.2		—

Subtotal		806.9		152.4		654.5		—
Other marketable securities		201.6		201.6		—		—
Derivative financial instruments		0.1		—		0.1		—

Total Assets	$	1,008.6	$	354.0	$	654.6	$	—

Liabilities
Loan related to other marketable securities	$	201.6	$	201.6	$	—	$	—
Derivative financial instruments		2.4		—		2.4		—

Total Liabilities	$	204.0	$	201.6	$	2.4	$	—


			Fair Value Measurements at December 30, 2011
	Balance at 12/30/11		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	195.7	$	195.7	$	—	$	—
Corporate debt obligations guaranteed by FDIC		66.8		—		66.8		—
Corporate debt obligations		201.5		—		201.5		—
Mortgaged backed debt obligations guaranteed by GNMA		91.2		—		91.2		—
Certificates of deposit guaranteed by FDIC		1.5		—		1.5		—
Foreign government debt obligations		223.0		—		223.0		—
Foreign corporate debt obligations		64.2		—		64.2		—

Subtotal		843.9		195.7		648.2		—
Other marketable securities		190.9		190.9		—		—
Derivative financial instruments		0.2		—		0.2		—

Total Assets	$	1,035.0	$	386.6	$	648.4	$	—

Liabilities
Loan related to other marketable securities	$	190.9	$	190.9	$	—	$	—
Derivative financial instruments		0.2		—		0.2		—

Total Liabilities	$	191.1	$	190.9	$	0.2	$	—