Stocks in focus for Tuesday By: MarketWatch January 16, 2010 at 00:01 AM EST Among the companies whose shares are expected to see active tradfing on Tuesday, when markets re-open after a three-day hoiday weekend, are IBM, Citigroup and CSX. Read More >> Related Stocks: AT&T Inc Amtd Idea Group Apple CSX Corp Fastenal Co International Business Machines Parker-Hannifin Verizon Communications