31, 2010 and January 25, 2009, we had $1.73 billion and $1.26 billion, respectively, in cash, cash equivalents and marketable securities.  Our investment policy requires the purchase of top-tier investment grade securities, the diversification of asset types and includes certain limits on our portfolio duration, as specified in our investment policy guidelines. These guidelines also limit the amount of credit exposure to any one issue, issuer or type of instrument. As of January 31, 2010, we were in compliance with our investment policy.  As of January 31, 2010, our investments in government agencies and government sponsored enterprises represented approximately 62% of our total investment portfolio, while the financial sector accounted for approximately 22% of our total investment portfolio. All of our investments are with A/A2 or better rated securities.



  We performed an impairment review of our investment portfolio as of January 31, 2010.  Based on our quarterly impairment review, we concluded that our investments were appropriately valued and did not record any impairment during fiscal year 2010.  However, we recorded other than temporary impairment charges of $9.9 million during fiscal year 2009. These charges included $5.6 million related to an other than temporary impairment of our investment in the money market funds held by the Reserve International Liquidity Fund, Ltd., or International Reserve Fund, $2.5 million related to a decline in the value of publicly traded equity securities, and $1.8 million related to debt securities held by us that were issued by companies that had filed for bankruptcy.   Please refer to Note 18 of the Notes to the Consolidated Financial Statements in Part IV, Item 15 of this Form 10-K for further details.



  Net realized gains, excluding any impairment charges, were $1.8 million and $2.1 million for fiscal year 2010 and 2009, respectively. Net realized gains for fiscal year 2008 were not material. As of January 31, 2010, we had a net unrealized gain of $12.6 million, which was comprised of gross unrealized gains of $12.7 million, offset by $0.1 million of gross unrealized losses.  As of January 25, 2009, we had a net unrealized gain of $4.4 million, which was comprised of gross unrealized gains of $7.8 million, offset by $3.4 million of gross unrealized losses.    



As of January 31, 2010, we held a money market investment in the International Reserve Fund, which was valued at $13.0 million, net of $5.6 million of other than temporary impairment charges that we recorded during fiscal year 2009. We reclassified this amount out of cash and cash equivalents in our Consolidated Balance Sheet due to the halting of redemption requests in September 2008 by the International Reserve Fund. The $13.0 million value of our holdings in the International Reserve Fund as of January 31, 2010 reflects an initial investment of $130.0 million, reduced by $111.4 million that we received from the International Reserve Fund during the fiscal year 2010 and the $5.6 million other than temporary impairment charge we recorded against the value of this investment during fiscal year 2009. The $111.4 million we received was