``The market may open lower on weak Asian stocks. Trading of S&P CNX Nifty futures on the Singapore stock exchange indicates a fall of 21.50 points at the opening bell. High volatility is expected on the bourses this week as traders roll over positions in futures & options segment from the near-month December 2011 series to January 2012 series. The near-month December 2011 F&O contracts expire on Thursday, Dec. 29, 2011,`` said Swastika Investmart.
Market may open lower on weak Asian stocks: