NEW YORK (Reuters) - Microsoft Corp. has stepped  up its pursuit of a deal to buy Yahoo Inc., two  newspapers reported on Friday, as the two companies reenter  talks to strike a deal amid huge growth from rival Google Inc.  
 	 Yahoo shares jumped 14.6 percent to $32.20 in electronic  trading on Friday, while Microsoft shares fell 1.4 percent to  $30.53.
 	 The two companies have held informal deal talks over the  years. But the latest approach comes as Microsoft seeks to ink  a deal in the wake of Google's expansion.
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