Wal-Mart Sales Cast Gloom, Stocks Fall  NEW YORK (Reuters) - Stocks fell on Monday 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; recorded disappointing Thanksgiving sales,  hurting hopes for a strong holiday retail season.