Oil prices down 20 percent in a month as fundamentals weaken

SINGAPORE (Reuters) - Oil markets on Friday remained weak as rising supply and concerns of an economic slowdown pressured prices, with U.S. crude now down by 20 percent since early October.U.S. West Texas Intermediate (WTI) crude oil futures were at $61.63 per barrel at 0125 GMT, down 4 cents from their last settlement.Front-month Brent crude oil futures were at $70.79 a barrel, 14 cents above their last closeHowever, both Brent and WTI have declined by around 20 percent from four-year highs in..