** S&P 500 energy index .SPNY down 0.3%, tracking a dip in crude prices O/R

** Brent Crude futures LCOc1 down 0.3% at $67.57/barrel; U.S. West Texas Intermediate crude CLc1 falls 1.2% to $64.75/barrel

** Crude prices slipped as investors weighed easing Middle East risk alongside a possible OPEC+ output increase in August and uncertainty over the global demand outlook

** Energy major Chevron CVX.N down marginally

** Diamondback Energy FANG.O, EOG Resources EOG.N, Devon Energy DVN.N and Exxon Mobil XOM.N decline between 0.8% and 1.4%; among the top percentage losers on the energy index

** Oil and gas producers Occidental Petroleum OXY.N and APA Corp APA.O down marginally

** Refiner Marathon Petroleum MPC.N down marginally

(Reporting by Sumit Saha in Bengaluru)

((Sumit.Saha@thomsonreuters.com;))