Oil prices fluctuated Wednesday ahead of key U.S. supply data as investors assessed the scale of the global supply glut. Oil prices have jumped by more than 60% since their lows earlier this year on hopes that global oversupply, which has battered prices for nearly two years, will start to abate soon. However, prices have shed some 5% of those gains in the past few sessions. “Prices will likely remain volatile, caught between a bearish narrative of prompt global oversupply and a bullish narrative of market balancing as soon as late 2016,” analysts at Barclays BCS -4.27 % said in a report Wednesday. Brent crude, the global oil benchmark, fell 0.1% to $44.93 a barrel on London’s ICE Futures exchange. On the New York Mercantile Exchange, West Texas Intermediate futures were trading up 0.2% at $43.72 […]