JPMorgan Chase & Co.’s investment bank has seen revenue from sales and trading drop about 20 percent so far in 2016 from a year earlier, according to the division’s chief, Daniel Pinto.

Earnings from that business last year had been helped by the Swiss franc’s surge. Lower earnings from debt and equity capital markets underwriting is seen contributing to a 25 percent drop in the division’s fee revenue this quarter, Pinto said Tuesday at the bank’s annual investor conference.