Fink told CNBC he could see yields on U.S. 10-year Treasuries sinking as low as 0.75 percent as central bank purchases have reduced available assets and pushed cash to the sidelines. But he said U.S. stock prices are not currently justified unless quarterly corporate earnings are higher than currently estimated. He also said he was surprised by the Bank of England's move on Thursday to keep interest rates on hold as Britain heads into what he sees as a likely recession.

(Reporting by Trevor Hunnicutt; Editing by Chizu Nomiyama)