Stocks End Lower on Retail, Price Data  NEW YORK (Reuters) - U.S. stocks ended lower on Tuesday, as  a lackluster sales report from world's largest retailer  Wal-Mart Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WMT.N target=/stocks/quickinfo/fullquote"&gt;WMT.N&lt;/A&gt; hurt that sector and a jump in  producer prices sparked concerns about inflation and higher  interest rates.