U.S. oil price turns negative for first time in history

A man wearing a face mask fills up in Plano, Texas, the United States, on April 20, 2020. U.S. oil prices crashed to the negative territory for the first time in history on Monday. The West Texas Intermediate (WTI) for May delivery shed 55.9 U.S. dollars, or over 305 percent, to settle at -37.63 dollars a barrel on the New York Mercantile Exchange. (Photo by Dan Tian/Xinhua)