At a U.S. House Financial Services Committee hearing on how eight large banks used taxpayer money from the $700 billion bailout fund, each executive was asked how much of their personal wealth they had invested in their own bank during the past six months * Bank of America CEO Kenneth Lewis says bought 400,000 company shares in past six months. * JPMorgan CEO Jamie Dimon says invested $12 million in his company. * Citigroup CEO Vikram Pandit says invested $8.4 million in his company. * Goldman Sachs, New York Mellon, State Street, Morgan Stanley, Wells Fargo CEOs each said they had invested no additional personal wealth in their own companies during the past six months.