On October 2, 2002, a clerk at Bear Stearns had erroneously entered an order to sell nearly $4 billion worth of securities. The trader had sent an order to sell $4 million worth. Only $622 million of the order was executed, and the remainder of the order was canceled prior to execution. Reports stated that it was a human error, not a computer error and that it was the fault of the clerk, not the trader. What is your opinion of these reports? What controls could have prevented this error?