Benchmark oil prices continue to decrease Friday morning. Accordingly, the January futures of Brent oil were at $81.33 per barrel at London's ICE Futures exchange, which is $0.09 (0.1%) lower than the closing price of the previous session. And the WTI oil futures for January fell $0.7 (0.9%) to $76.42 a barrel in the morning online trading at the New York Mercantile Exchange (NYMEX).