The thud you just heard was oil prices dropping in Tuesday’s trading as U.S. crude oil sank 6.2% on a nearly $4 fall.
Energy companies also suffered from the steep drop in the price of crude oil.
West Texas Intermediate crude for May delivery fell $3.79 to $57.26 a barrel in trading on the New York Mercantile Exchange.
Brent crude oil for May delivery dropped $3.83 to $60.79 a barrel in trading on ICE Futures Europe.
April natural gas also dropped. It fell 7 cents to $2.51 per 1,000 cubic feet. The fall in oil and gas came as energy prices had been steadily climbing this year but in recent days, production around the world had been restrained.
Oklahoma energy stocks, for the most part suffered losses with only a few making some slight gains. The three firms that had the biggest losses included LSB Industries with a nearly 13% loss for the day at 58 cents a share, settling at $4.02.
Laredo Petroleum lost nearly 10% on a $3.15 fall to $29.43. Cypress Environmental Partners lost 9.24% as shares fell 29 cents to close at $2.80.
Alliance Resource Partners had a 3.67% loss on a 21 cent fall to $5.51.

Chevron (CVX) down 0.57 at 101.97 – change 0.56%
ConocoPhillips (COP) down 0.51 at 51.71 – change 0.98%
Diamondback Energy (FANG) down 3.18 at 72.13 – change 4.22%
Energy Transfer LP (ET) down 0.38 at 7.72 – change 4.69%
Enterprise Products Partners (EPD) down 0.58 at 22.30 – change 2.53%
EOG Resources (EOG) up 1.42 at 69.65 – change 2.08%
ExxonMobil (XOM) down 0.70 at 55.22 – change 1.25%
Kinder Morgan (KMI) down 0.10 at 15.68 – change 0.63%
Marathon Oil Corp. (MRO) down 0.65 at 10.17 – change 6.05%
National Oilwell Varco (NOV) down 0.73 at 13.63 – change 5.08%
Occidental Petroleum (OXY) down 0.86 at 26.59 – change 3.13%
Phillips 66 (PSX) down 1.54 at 78.98 – change 1.91%
Pioneer Natural Resources (PXD) down 1.28 at 157.34 – change 0.81%
Valero (VLO) down 2.17 at 70.08 – change 3.00%
CLOSING TOP UTILITY STOCKS
American Electric Power (AEP) up 1.01 at 84.64 – change 1.21%
CenterPoint (CNP) down 0.08 at 21.88 – change 0.36%
Entergy (ETR) up 0.43 at 98.11 – change 0.44%