By Samantha Sunne
NEW YORK (Reuters) - Brent (brent.167)crude oil prices dipped on Wednesday, threatening to touch new six-year lows after an unexpected big rise in U.S. crude and fuel inventories and a dimmer view of world economic growth next year.
U.S. crude prices
Late on Tuesday, the World Bank lowered its 2015 and 2016 world economic growth forecasts, reinforcing worries about sluggish demand growth in the oversupplied energy markets.
Brent
U.S. crude
The spread, or transatlantic arbitrage, had closed on Tuesday at 70 cents after both contracts both traded at $46 for the first time since October.
"(With the) velocity of the downward trend that we've been in, you can expect to see any violent snapbacks," said Tariq Zahir of Tyche Capital.
U.S. government data showed crude stocks rose 5.4 million barrels, more than 10 times what analysts had expected. Inventories at the Cushing, Oklahoma, delivery hub for the U.S. futures contract, rose 1.8 million barrels.
But the big builds in inventories may have been offset by figures showing an increase in demand, said Andrew Lipow, president of Lipow Oil Associates.
"This really just offset an atrocious demand figure last week," he said.
Even as the market appeared to pause from a seven-month rout that has knocked about 60 percent off prices, few analysts were ready to call for a bottom.
"I think it's just a bit of short covering that's still going on, to be honest," said Dominick Chirichella of the Energy Management Institute. "I think we're still in a downtrend."
(Additional reporting by Libby George and Himanshu Ojha in London, Henning Gloystein and Florence Tan in Singapore; Editing by Marguerita Choy)