Stocks Fall on Oil, Fannie Mae Probe  NEW YORK (Reuters) - Stocks fell on Wednesday after oil  prices jumped more than a dollar to over \$48 a barrel and a  U.S. government review questioned home finance company Fannie  Mae's &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=FNM.N target=/stocks/quickinfo/fullquote"&gt;FNM.N&lt;/A&gt; accounting methods.