keywords: stocks reuters caterpillar companies investor
text: Stocks Up on Caterpillar, Oil Companies  NEW YORK (Reuters) - Stocks staged a late rally on Tuesday  after Caterpillar Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CAT.N target=/stocks/quickinfo/fullquote"&gt;CAT.N&lt;/A&gt;, the world's largest maker of  heavy equipment, raised its revenue outlook, and shares of  energy and metal producers rose on higher commodity prices.