** Shares of derivatives exchange CME Group CME.O and Cboe Global CBOE.Z dip 0.6% each after Federal Reserve Chair Jerome Powell's speech

** Powell signals possible rate cut in September, saying inflation risks from tariffs could be short-lived

** A rate cut and improved market certainty reduce demand for hedging, a key driver of volumes at CME and Cboe

** YTD, CME and Cboe have gained ~18% and ~28% respectively, as of Friday's close

** Meanwhile, NYSE-owner Intercontinental Exchange ICE.N and Nasdaq NDAQ.O up 0.3% and 0.5%, respectively, on Friday

(Reporting by Niket Nishant in Bengaluru)

((Niket.Nishant@thomsonreuters.com))