Credit Suisse chief executive Brady Dougan cautioned on Wednesday that the performance of the Swiss firm's investment bank was mixed in the third quarter, but added that the bank as a whole is well positioned to deal with difficult market conditions.

Speaking to investors at a conference hosted by Bank Of America Merrill Lynch, Dougan said that volumes in some businesses, including fixed income and currency trading, have been "a bit more subdued," in the third quarter. Equity trading, too, was marked by lower volumes, he said.