Blue Chip Stocks Fall, Techs Rise  NEW YORK (Reuters) - U.S. blue chip stocks were lower on  Friday after a profit warning from aluminum maker Alcoa Inc.   &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=AA.N target=/stocks/quickinfo/fullquote"&gt;AA.N&lt;/A&gt;, but technology stocks edged higher after a judge  rejected a government bid to block a takeover of 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; by Oracle Corp.&lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ORCL.O target=/stocks/quickinfo/fullquote"&gt;ORCL.O&lt;/A&gt;.