BATS Exchange, an innovative and technology leading U.S. securities exchange, welcomed Denny Thum, Kansas City Chiefs President, and Chiefs mascot KC Wolf on Wednesday for its daily closing bell ceremony, which signifies the open and close of the U.S. stock market each day. "We are thrilled to have Mr. Thum and KC Wolf to help us close the market on BATS Exchange today," said Joe Ratterman, CEO of BATS Global Markets and BATS Exchange.