The domestic stocks markets opened the first trading day of 2012 on a positive note, with the Sensex at the Bombay Stock Exchange gaining 69 points, or 0.5 per cent, to 15,524 points, in early trade, after the government decided to allow Qualified Foreign Investors to directly invest in the equity market.But the market later turned very volatile, and after moving in and out of positive territory, the Sensex stood 7 points in the negative zone, at 15,448, in afternoon trade. The Sensex has already lost over 500 points in the past four trading sessions.Other Asian markets in China, Indonesia, Taiwan, and South Korea were trading mixed, on continued concerns about global economic recovery being hampered by Europe's debt crisis.