Oil futures finished with a gain on Tuesday, with U.S. prices recouping a portion of the 7.5% loss suffered a day earlier. Traders continued to weigh the outlook for supply and demand on the back of the OPEC+ deal to boost output and the spread of the COVID delta variant, which threatens demand for energy. Unless the delta variant "really catches like a brushfire," the extra oil from OPEC+ is "going to be absorbed without killing crude prices," said Stewart Glickman, energy equity analyst at CFRA. He believes U.S. benchmark West Texas Intermediate prices will stay above $55 a barrel over the next 12 months. On its expiration day, WTI oil for August delivery tacked on $1, or 1.5%, to end at $67.42 a barrel on the New York Mercantile Exchange. September WTI crude , which is now the front month, added 85 cents, or 1.2%, to settle at $67.20.