Stocks Sink on Oil Prices, Morgan Stanley  NEW YORK (Reuters) - Stocks fell sharply on Wednesday after  oil prices jumped more than a dollar to over \$48 a barrel and  investment bank Morgan Stanley &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MWD.N target=/stocks/quickinfo/fullquote"&gt;MWD.N&lt;/A&gt; reported a drop in its  quarterly profit.