Oil prices tumbled on Tuesday after reports of swelling inventories and forecasts that record U.S. and Russian output will hit a market that may see weaker demand if global growth deteriorates as many expect. U.S. crude oil fell $2.78, or 5.5 percent to trade at $47.10 a barrel by 11:44 a.m. EST (1644 GMT). The session low was $46.97, its weakest since September 2017. Global benchmark Brent lost $2.54, or 4.2 percent to trade at $57.07 a barrel. During the session, Brent hit a 14-month low of $56.86. World stock markets inched higher as investors looked ahead to whether the U.S. Federal Reserve will be able to raise interest rates much further. Equity markets have had steep declines over the last two months. Investor confidence is deteriorating, with more fund managers expecting global growth to weaken over the next 12 months, the worst outlook in […]