TABLE-U.S. banks' capital ratios under Fed stress tests

March 20 (Reuters) - The Federal Reserve said on Thursday that all but one of the 30 banks it subjected to its annual stress tests had sufficient capital to withstand a hypothetical economic crisis. Only Zions Bancorporation, a Salt Lake City, Utah-based lender with $56.0 billion in assets, would be left with a regulatory capital ratio beneath the Fed's 5.0 percent minimum under the exercise. The results of the tests inform regulators' decision on whether to allow banks to repurchase t