(Bloomberg) -- Famed bond investor Jeffrey Gundlach said Deutsche Bank AG’s slumping share price highlights the impact of the negative-interest-rate policy in Europe on the region’s lenders and may help prompt central bankers to reconsider their approach.

“You cannot save your faltering economy by killing your financial system and one of the clear poster children for this is Deutsche Bank’s stock price,” Gundlach, 56, said at Grant’s Fall 2016 Investment Conference on Tuesday in New York. “If you keep these negative interest rate policies for a sufficient future period of time you are going to bankrupt these banks.”

Europe’s banks have seen their value shrink by about $280 billion this year, with Deutsche Bank losing almost half its market value. Germany’s largest lender extended losses after the U.S. Department of Justice last month requested $14 billion to settle a probe into residential mortgage-backed securities, sparking concerns that it will have to raise capital.

While the Frankfurt-based bank would ultimately be rescued by the German government if needed, other banks in the region wouldn’t be able to count on such support, Gundlach said.

“Deutsche Bank will be supported by Germany if push comes to shove,” he said. “But what about Credit Suisse, which has shown a similar decline in stock price? Who’s there to bail them out?”

Credit Suisse, which is based in Zurich, has lost about 40 percent of its value this year. The Swiss bank raised about $6 billion of capital last year under new Chief Executive Officer Tidjane Thiam to help fund a restructuring plan.

Bond investors including Gundlach and Janus Capital Group Inc.’s Bill Gross have warned for some time that negative rates risk undermining the proper functioning of capital markets. Gundlach, who oversees $106 billion as chief investment officer of DoubleLine Capital, said in February that falling share prices of Deutsche Bank and Credit Suisse were “frightening.”

Even the Federal Reserve, which has not cut rates below zero, is seeing signs that its policies aren’t working, Gundlach added Tuesday.

Gundlach has said that interest rates bottomed in July and that the market is looking for signs of fiscal stimulus and accelerating inflation. He’s predicting that rates on the U.S. 10-year bond may surpass 2 percent by the end of 2016.

--With assistance from John Gittelsohn To contact the reporter on this story: Simone Foxman in New York at To contact the editors responsible for this story: Margaret Collins at, Christian Baumgaertel, Josh Friedman

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