With less than three weeks to go before OPEC meets in Vienna and the selloff in oil showing few signs of letting up, speculation is mounting the group will take action to try to stem the decline. Brent crude, the benchmark for more than half of the world’s oil, gained 53 cents to close at $83.39 today and is down 28 percent from a high of $115.06 in June on the London-based ICE Futures Europe exchange. West Texas Intermediate oil rose 74 cents to $78.65 on the New York Mercantile Exchange. It’s down 27 percent from its June peak. OPEC said yesterday the world will need less of its oil for most of the next two decades than previously estimated as U.S. shale production grows. OPEC lowered every forecast for its crude through 2035 except next year. Here’s how four analysts across Europe and the U.S. see the Nov. […]