U.S. Stocks End Higher After Oracle Deal  NEW YORK (Reuters) - U.S. stocks rallied on Monday after  software maker PeopleSoft Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PSFT.O target=/stocks/quickinfo/fullquote"&gt;PSFT.O&lt;/A&gt; accepted a sweetened  \$10.3 billion buyout by rival Oracle Corp.'s &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ORCL.O target=/stocks/quickinfo/fullquote"&gt;ORCL.O&lt;/A&gt; and other  big deals raised expectations of more takeovers.