Credit Suisse has seen provisions for credit losses rise to CHF 65m ($64.75m) in the third quarter in "challenging conditions".
The figure compares to CHF 32m a year ago, the Swiss shipping lender said.
But net profit rose to CHF 424m from CHF 244m as costs were cut.
CEO Tidjane Thiam said the first six months were characterised by generally favourable markets and strong client activity levels.
