Stocks End Lower After Coca-Cola Warning  NEW YORK (Reuters) - U.S. stocks declined 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; renewed worry  about corporate profits and a downgrade of the technology  sector by Goldman Sachs weighed on markets.