Sept 22 (Reuters) - The Federal Reserve will "soon" release research examining the costs and benefits of a central bank digital currency, or CBDC, Fed Chair Jerome Powell said on Wednesday. Crypto enthusiasts and members of the financial industry are eagerly awaiting the Fed's research, which was initially slated to be released over the summer, for hints on where policymakers stand on whether the United States should issue a CBDC. Powell said on Wednesday that no decision has been made and that the priority is for the U.S. payments system to remain "stable and trustworthy." "We're working proactively to evaluate whether to issue a CBDC and, if so, in what form," Powell said in a news conference following the conclusion of the U.S. central bank's latest two-day policy meeting. The ultimate test that will apply when assessing a CBDC, he told reporters, is if there are "clear and tangible benefits that outweigh any costs and risks." Fede...