Three executives at the financial giant JPMorgan Chase have resigned over risky derivatives trading that cost the bank at least $2 billion. The ousted executives include Ina Drew, the head of risk management at JPMorgan and the bank’s chief investment officer. The loss has renewed calls for tougher regulation of Wall Street, with critics saying JPMorgan would have avoided the loss under regulations that it successfully opposed. JPMorgan was among a number of large banks to lobby against the Volcker Rule, which would prevent banks from certain kinds of risky trading. Speaking on NBC’s “Meet the Press,” JPMorgan CEO Jamie Dimon says he expects increased scrutiny from regulators.

Jamie Dimon: “We’ve had audit, legal, risk, compliance, some of our best people look into at all of that. We know we were sloppy. We know we were stupid. We know there was bad judgment. We don’t know if any of that is true yet. Of course regulators should look at something like this, that’s their job. So, you know, we are totally open kimono with regulators, and they will come to their own conclusions. But we intend to fix it, learn from it, and be a better company when it’s done.”