Wal-Mart Falls 3 Pct on Forecast Cut  NEW YORK (Reuters) - 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; shares  fell 3 percent early Monday after the world's biggest retailer  cut its November sales forecast, casting a shadow over hopes  for a bumper holiday shopping season.