Investing.com - Oil prices turned lower on Thursday after data showing a fresh record in U.S. crude inventories
Swelling inventories damped hopes that a 20-month-long market rout is coming to an end
U.S. crude inventories rose 10.4 million barrels to a fresh record of 517.98 million barrels last week
Oil prices have fallen around 70% since mid-2014 as a result of global oil production outstripping demand