Securities regulators in Illinois are pressuring Bear Stearns to turn over documents that contain proof of market-timing improprieties, Dow Jones reports, citing unnamed sources.

Illinois sent a notice to the firm on Feb. 10 asking its executives to appear before a hearing on April 6 to fess up on why they failed to respond to a subpoena the month before. The state told the firm that it might penalize it with a fine or revocation of its state license should it not comply with its request.

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