Stocks Fall on J.P. Morgan Chase and Oil  NEW YORK (Reuters) - U.S. stocks fell on Wednesday as  weaker-than-expected earnings from J.P. Morgan Chase   Co.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=JPM.N target=/stocks/quickinfo/fullquote"&gt;JPM.N&lt;/A&gt;, the second largest U.S. bank, dampened Wall Street's  mood.