NEW YORK, June 12 (Reuters) - JPMorgan Chase ( JPM )

expects its investment banking revenue to jump by between 25% to

30% in the second quarter, higher than its previous estimates,

co-chief executive of its commercial and investment bank Troy

Rohrbaugh said on Wednesday.

The lender had estimated in May that its investment banking

revenue would rise by a mid-teens percentage in the second

quarter.