Wall Street Roundup: More Lehman trickery? WaMu in the spotlight.

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Trade deficit up. Growing demand for imports has driven up the U.S. trade deficit, according to new Commerce Department figures. Both imports and exports rose in February.

More Lehman trickery? Lehman used a shadowy company -- an ‘alter ego’ firm -- to move around investments and make its balance sheet look stronger than it was, the New York Times reports.

WaMu on trial. The nation’s largest bank failure, Washington Mutual, will be the subject of a congressional hearing Tuesday morning. The hearings come after revelations about the behavior of the bank’s executives and regulators before the financial meltdown.

AIG’s bonuses. AIG detailed the compensation it gave to top officers in a filing with the Securities and Exchange Commission. The company complained about the cuts that the government’s pay czar forced on the firm.

-- Nathaniel Popper in New York