Stocks Slip, Retail, Finance Weigh  NEW YORK (Reuters) - U.S. stocks declined on Tuesday,  weighed down by retailers after 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;  reported lackluster sales, while a jump in producer prices  revived worries that the Fed could be more aggressive about  raising interest rates to rein in inflation.