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% from a high of $115.06 in June on the London- based ICE Futures Europe exchange.