An escalation of the trade spat is one risk to an otherwise strong U.S. economy, he said.
Deutsche Bank has been added to a list of banks with weaknesses serious enough to endanger their financial viability.
On America’s over-the-counter stock market, investors lost 27 percent a year on average in the decade through 2010.
The Frankfurt-based lender has had success selling junk bonds to billionaires such as Carl Icahn and Paul Coulson.