Daniel Pinto, JPMorgan's chief executive of corporate and investment bank.

J.P. Morgan Chase, the world's biggest investment bank by revenue, said trading revenue in the second quarter is likely to be about unchanged from a year ago amid charges related to taxes and accounting rule changes.

"Overall, markets revenue as we see it today will be flat year on year," Co-president Daniel Pinto said Tuesday during a conference in New York. "The core activities will be up let's say mid single digits. Then we have a series of one-offs that overall take that back down to flat."