Goel admitted in his plea proceeding last year and at trial on Tuesday that he tipped Rajaratnam about a big wireless network transaction involving Clearwire Corp (CLWR.O) Also on Tuesday, a current Intel executive testified that confidential details about Clearwire were leaked before the announcement of the deal. Prosecutors argued that Rajaratnam, who is on trial on charges of trading on illicit stock tips, bought 125,800 Clearwire shares based on inside information. They contend that his March 24, 2008, purchase came two days before news reports of a possible 4G WiMax venture between Clearwire and Sprint Nextel Corp (S.N), involving $1 billion of capital from Intel.