Natural gas prices at the Waha hub in West Texas plummeted to record low negative levels on Wednesday, as pipeline constraints and problems at compressor stations at one pipeline stranded gas produced in the most prolific U.S. shale oil basin. Real-time or next-day prices at the Waha hub in Texas have stayed at negative levels since March 22, so drillers have had to pay companies with capacity to ship the gas via pipeline. On Wednesday, the spot Waha hub prices plunged to minus $3.38 per million British thermal units (MMBtu), from minus 2 cents for Tuesday, data from the Intercontinental...