JPMorgan said that its trading revenue hit $90 million on 39 days during the first quarter, and exceeded $180 million on nine days, or about 14 percent of the time.

A JPMorgan spokesman said the last time the bank had a perfect run was the first quarter of 2003. “The high level of trading and securities gains in the first quarter of 2010 is not likely to continue throughout 2010,” Morgan said in a regular filing with the Securities and Exchange Commission this week.

Goldman Sachs — which is fighting an S.E.C. suit claiming the bank defrauded customers on a complex mortgage investment — posted its first perfect quarter ever. Goldman made at least $100 million on 35 days during the quarter, and at least $25 million on the remaining trading days.

In the wake of the S.E.C. suit, Goldman’s role as a market maker has come under scrutiny on Capitol Hill. It has staunchly defended its business practices and said it had done nothing wrong.

Gary D. Cohn, Goldman’s president, said Tuesday that the standout quarter highlighted the strength of the trading that Goldman executed for its customers, particularly its fixed income, currency and commodities unit, known as FICC. “Our FICC and equities businesses are largely global market-making businesses where we intermediate flows and commit capital and liquidity and in the process generate revenue including bid-offer spreads,” Mr. Cohn said at a UBS conference in New York. “These franchises create numerous opportunities for the firm.”

Citigroup also had a loss-free first quarter, according to a person briefed on the situation. The bank discloses its trading performance on an annual basis, but big daily losses have been a regular occurrence over the last few years. In 2008, it lost $400 million on 21 of its 260 trading days.

This year, even those that lost money from time to time, performed very well during the quarter. Morgan Stanley said its losses reached as much as $30 million only four days in an otherwise profitable quarter. A Morgan Stanley spokesman said the firm’s last perfect run was the second quarter of 2007.