Asian markets were mixed on Monday, AP reported. Tokyo's Nikkei 225 lost 2.8% to 18,851.04, while the Kospi in South Korea reversed early losses, gaining 0.4% to 1,717.10. The Shanghai Composite shed 0.7% to 2,752.53, while the Hang Seng in Hong Kong lost 0.4% to 23,399.38. Shares fell in Southeast Asia. India's Sensex fell 2%. U.S. benchmark crude dropped 4.2% or $91 cents on Monday to $20.60 per barrel in electronic trading on the New York Mercantile Exchange. It slid 4.8% to close at $21.51 a barrel on Friday. Brent crude, the international standard, gave up 4.2% or $1.16 to $26.79 per barrel. In currency trading, the dollar was at 107.75 Japanese yen, down from 107.94 late Friday. The euro weakened to $1.1078 from $1.1142.