JPMorgan Chase has suspended its share-repurchase program in light of the bank’s $2 billion-plus trading loss because the loss has constrained the bank’s efforts to strengthen its capitalization, CEO Jamie Dimon said yesterday.

Dimon has been scrambling to blunt the damage from the disclosure of the trading loss in its chief investment office, which is supposed to oversee hedging for the firm’s balance sheet. The CEO said yesterday that the firm was making progress on risk reduction.

“We’re going to wrestle this problem down, and hopefully by the end of the year we will make this something we don’t need to talk about,” he said.

For now, however, Dimon said the bank is suspending a $15-billion share-buyback program launched after the bank passed a Federal Reserve stress test in mid-March.

“We intend to restart it, but we’re not going to tell people when we do that,” Dimon said of the program.

He did say the bank intends to keep its current dividend in place.