Investments

As of February 27, 2014 and August 29, 2013, the fair values, which approximated amortized costs, of available-for-sale investments were as follows:



As of	February 27, 2014		August 29, 2013
Money market funds	$	1,137	$	1,188
Corporate bonds	456		414
Government securities	141		168
Asset-backed securities	123		97
Certificates of deposit	100		349
Commercial paper	23		61
Marketable equity securities	1		6
	$	1,981	$	2,283

The table below presents the fair value of available-for-sale debt securities as of February 27, 2014, by contractual maturity:



Money market funds not due at a single maturity date	$	1,137
Due in 1 year or less	292
Due in 1 - 2 years	268
Due in 2 - 4 years	266
Due after 4 years	17
	$	1,980

Proceeds from the sales of available-for-sale securities were $110 million and $223 million for the second quarter and first six months of 2014, respectively, and $67 million and $160 million for the second quarter and first six months of 2013, respectively. Gross realized gains and losses for the second quarter and first six months of 2014 and 2013 were not significant. As of February 27, 2014, no available-for-sale security had been in a loss position for longer than 12 months.