Its shares fell 5.7%, with analysts pointing to the further Archegos hit and dilution caused by the issuance announced on Thursday of bonds convertible into 203 million shares.
In response, the bank is cutting its prime brokerage business, which caters to hedge fund clients, by about a third.
Losses at Archegos, a family office run by former Tiger Asia manager Bill Hwang, sparked a sell-off in bank stocks on Monday as investors feared they would be forced to take big write-downs after extending billions of dollars in leverage to the fund.
Global lenders may lose more than $6 billion on Archegos, sources familiar with trades involving the US investment firm have said.