Yahoo (YHOO) calls are active. 51,000 have traded, roughly 5 times the number of put options. The January 20s are the most actives as a block of 19,379 contracts traded on the offer for 60 cents a contract 30 minutes ago. These options have open interest of 61,552 and, with YHOO up 23 cents to $13.16, are more than 50 percent out of the money. Today’s volume might be closing.