Rajat Gupta, while on the Goldman Sachs Group Inc. board in 2008, told Galleon Group LLC co-founder Raj Rajaratnam of the board's talks on whether to buy American International Group Inc. or Wachovia Corp., according to a wiretapped recording. Prosecutors at Rajaratnam's insider trading trial yesterday played a recording of a July 2008 discussion between the two men, one of about 170 wiretaps the government said it plans to present in Manhattan federal court. During the conversation, Rajaratnam asked about a "rumor that Goldman may look to buy a commercial bank."