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MARKETABLE SECURITIES | 12 Months Ended
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Oct. 31, 2014
MARKETABLE SECURITIES |
MARKETABLE SECURITIES | 11. MARKETABLE SECURITIES All marketable securities are classified as available-for-sale, with unrealized gains and losses shown as a component of stockholders’ equity. Realized gains or losses from the sales of marketable securities are based on the specific identification method. The amortized cost and fair value of marketable securities at October 31 in millions of dollars follow:
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
2014 |  |  |  |  |  |  |  |  |
Equity fund |  | $ | 39 |  | $ | 6 |  |  |  | $ | 45 |
Fixed income fund |  | 10 |  |  |  |  |  | 10 |
U.S. government debt securities |  | 806 |  | 3 |  | $ | 1 |  | 808 |
Municipal debt securities |  | 31 |  | 3 |  |  |  | 34 |
Corporate debt securities |  | 167 |  | 7 |  | 2 |  | 172 |
Mortgage-backed securities* |  | 145 |  | 3 |  | 2 |  | 146 |
Marketable securities |  | $ | 1,198 |  | $ | 22 |  | $ | 5 |  | $ | 1,215 |
2013 |  |  |  |  |  |  |  |  |
Equity fund |  | $ | 18 |  | $ | 2 |  |  |  | $ | 20 |
U.S. government debt securities |  | 1,309 |  | 5 |  | $ | 2 |  | 1,312 |
Municipal debt securities |  | 34 |  | 2 |  |  |  | 36 |
Corporate debt securities |  | 135 |  | 6 |  | 3 |  | 138 |
Mortgage-backed securities* |  | 121 |  | 2 |  | 4 |  | 119 |
Marketable securities |  | $ | 1,617 |  | $ | 17 |  | $ | 9 |  | $ | 1,625 |
* Primarily issued by U.S. government sponsored enterprises. The contractual maturities of debt securities at October 31, 2014 in millions of dollars follow:
|  | Amortized Cost |  | Fair Value |
Due in one year or less |  | $ | 722 |  | $ | 723 |
Due after one through five years |  | 90 |  | 93 |
Due after five through 10 years |  | 140 |  | 143 |
Due after 10 years |  | 52 |  | 55 |
Mortgage-backed securities |  | 145 |  | 146 |
Debt securities |  | $ | 1,149 |  | $ | 1,160 |
Actual maturities may differ from contractual maturities because some securities may be called or prepaid. Because of the potential for prepayment on mortgage-backed securities, they are not categorized by contractual maturity. Proceeds from the sales of available-for-sale securities were $6 million in 2014, $7 million in 2013 and $7 million in 2012. Realized gains, realized losses, the increase (decrease) in net unrealized gains or losses and unrealized losses that have been continuous for over twelve months were not significant in 2014, 2013 and 2012. Unrealized losses at October 31, 2014 and 2013 were primarily the result of an increase in interest rates and were not recognized in income due to the ability and intent to hold to maturity. There were no impairment write-downs in the periods reported.

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