text: Stocks Fall on Coke, Tech Downgrade  NEW YORK (Reuters) - U.S. stocks fell on Wednesday after a  profit warning from Coca-Cola Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KO.N target=/stocks/quickinfo/fullquote"&gt;KO.N&lt;/A&gt; stoked fears about  corporate profits and a downgrade of the technology sector by  investment bank Goldman Sachs weighed on markets.