Lawmakers likely will focus their questions on the OCC's oversight of J.

WSJ: Lawmakers Probe Oversight of J.P. Morgan

The arrangement was made with the Federal Reserve Bank of Cleveland and the OCC on April 29 and May 5, and alluded to in National City's quarterly financial filing with the Securities and Exchange Commission on May 12.

FORBES: Can Banking Shake The Crisis?

Mr. Curry declined to comment on future changes at the OCC, although he said his goal of being a "premier" bank regulator is "probably going to require some changes in terms of outlook at a minimum" and potentially staff changes.

WSJ: Comptroller Got Rude Introduction to Job

In the interview, Mr. Curry said the OCC needs to rely on what banks tell its examiners given the size and complexity of large financial institutions.

WSJ: Comptroller Got Rude Introduction to Job

Morgan announced the losses in May, OCC officials have sent mixed signals on whether the trades would have violated the Volcker rule, part of the Dodd-Frank financial-overhaul law that bans proprietary trading.

WSJ: Lawmakers Probe Oversight of J.P. Morgan

However according to the OCC, Cardle's track sold almost 170, 000 copies in its first two days on sale, more than three times the sales of its nearest rival, Rihanna Ft Drake, which ended up the week selling 104, 000.

BBC: X Factor's Matt Cardle grabs UK Christmas number one