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Murdoch's News Corp. to Join S P 500  NEW YORK (Reuters) - News Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=NWS.AX target=/stocks/quickinfo/fullquote"&gt;NWS.AX&lt;/A&gt; &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=NWS.N target=/stocks/quickinfo/fullquote"&gt;NWS.N&lt;/A&gt;, the media  company built by Rupert Murdoch, will join the Standard    Poor's 500 stock index after the close of trading on Dec. 17,  S P said on Tuesday. 