Investments include primarily investment-grade corporate bonds and asset-backed securities having maturities of up to five years (the “bond portfolio”) and money market investments. Investments in the bond portfolio are reported as

available-for-sale

and are carried at fair value. Investments maturing less than one year from the balance sheet date are included in short-term investments and investments maturing more than one year from the balance sheet date are included in other assets in the consolidated balance sheets. Management performs an analysis of the nature of the unrealized losses on

available-for-sale

investments to determine whether an allowance for credit loss is necessary. Unrealized losses, representing the excess of the purchase price of an investment over its fair value as of the end of a period, considered to be a result of credit-related factors, are to be included as a charge in the statement of income, while unrealized losses considered to be a result of noncredit-related factors are to be included as a component of shareholders’ equity. Investments whose values are based on quoted market prices in active markets are classified within Level 1. Investments that trade in markets that are not considered to be active, but are valued based on quoted market prices, are classified within Level 2. As Level 2 investments include positions that are not traded in active markets, valuations may be adjusted to reflect illiquidity and/or

non-transferability,

which are generally based on available market information. Any transfers between levels are recognized as of the beginning of any reporting period. Fair value of the bond portfolio was determined using Level 1 inputs related to U.S. Treasury obligations and money market investments and Level 2 inputs related to investment-grade corporate bonds, asset-backed securities and direct obligations of government agencies. Unrealized losses, net of unrealized gains, on the investments in the bond portfolio were $9,272,000 at June 25, 2022, while unrealized gains, net of unrealized losses, on the investments in the bond portfolio were $144,000 at December 25, 2021.

The amortized cost and fair values of

available-for-

sale

investments are as follows at June 25, 2022 and December 25, 2021 (in thousands):


			Gross		Gross
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
June 25, 2022
Money market investments	$	25,368	$	—	$	—	$	25,368
Asset-backed securities		20,504		—		2,135		18,369
Corporate bonds and direct obligations of
government agencies		124,513		29		7,104		117,438
U.S. Treasury obligations		2,342		—		62		2,280

Total	$	172,727	$	29	$	9,301	$	163,455

December 25, 2021
Money market investments	$	8,750	$	—	$	—	$	8,750
Asset-backed securities		22,441		—		346		22,095
Corporate bonds and direct obligations of
government agencies		137,916		1,406		966		138,356
U.S. Treasury obligations		2,342		50		—		2,392

Total	$	171,449	$	1,456	$	1,312	$	171,593

For those

available-for-sale

investments with unrealized losses at June 25, 2022 and December 25, 2021, the following table summarizes the duration of the unrealized loss (in thousands):


	Less than 12 months				12 months or longer				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
June 25, 2022
Asset-backed securities	$	18,369	$	2,135	$	—	$	—	$	18,369	$	2,135
Corporate bonds and direct obligations of government agencies		90,412		5,659		15,412		1,445		105,824		7,104
U.S. Treasury obligations		2,280		62		—		—		2,280		62

Total	$	111,061	$	7,856	$	15,412	$	1,445	$	126,473	$	9,301

December 25, 2021
Asset-backed securities	$	22,095	$	346	$	—	$	—	$	22,095	$	346
Corporate bonds and direct obligations of government agencies		72,526		966		—		—		72,526		966

Total	$	94,621	$	1,312	$	—	$	—	$	94,621	$	1,312

The Company believes unrealized losses on investments were primarily caused by rising interest rates rather than changes in credit quality. The Company expects to recover, through collection of all of the contractual cash flows of each security, the amortized cost basis of these securities as it does not intend to sell, and does not anticipate being required to sell, these securities before recovery of the cost basis. For these reasons, no losses have been recognized in the Company’s consolidated statements of income.