U.S. crude tumbled 10 percent in its biggest one-day drop in more than five years on Friday, and benchmark Brent broke below $70 a barrel, as OPEC’s decision not to cut output sent oil traders and analysts scurrying to find a new trading floor. “I see little reason to buy oil now. I think people are either going to drive it down further or just let the market collapse,” said Tariq Zahir, managing member at Tyche Capital Advisors in Hollow Way, New York. U.S. West Texas Intermediate (WTI) light crude ( WTI ) settled down $7.54 at $66.15 a barrel, and fell further post-settlement, reaching a four-year low of $65.69. The last time the market lost 10 percent in a day was in March 2009. North Sea Brent LCOc1 finished down $2.43, or 3.3 percent, at $70.15. It fell to as low as $69.78 on […]