US energy firms fall as oil plummets on China's retaliation against US tariffs

S&P 500 energy index .SPNY falls 1.5% as oil prices edge lower

Brent crude futures LCOc1 down 3.8% at $60.45 a barrel; U.S. West Texas Intermediate (WTI) crude CLc1 falls 3.7% to $57.37 a barrel

Oil prices fall, hitting fresh four-year lows before recovering some ground, after China announced additional tariffs on U.S. goods in retaliation against President Donald Trump's tariff policy

Oil majors Chevron CVX.N and Exxon Mobil XOM.N down over 0.9% and 1.2%, respectively

ONEOK OKE.N down 1.8%, Occidental OXY.N down 2.1% and Diamondback Energy FANG.O slides 2.5%, among top pct. losers on the energy index

Refiners Marathon Petroleum MPC.N and Valero Energy VLO.N down 1% and 1.6%, respectively

Oilfield equipment and services operators Baker Hughes BKR.O and Halliburton HAL.N slip 0.8% and 0.6%, respectively