Computer Associates (CA, news, chart, volatility) is down 50 cents to $18.30 and options volume is running at 9 times the average daily levels, with 21,000 puts and only 570 calls traded. The top trade of the day is 9,326 Feb. 12.5 puts at the offer for 25 cents. Looks like an opening buy. Seems like the Feb 17.5 and 15 puts are also being bought to open. No news today. Earnings due out late January/early Feb.