Sprint (S) loses a penny to $2.43 and more than 35,000 Dec 2.5 puts traded on the stock today. 99 percent traded at the ask, including a 24600-contract block for 16 cents. The next biggest trade is a 1279-lot for 13 cents on ISE and a customer buying-to-close, according to data from the exchange. Indeed, with the contract now 6 cents in-the-money heading into the expiration, investors might be closing some of the open interest (40,980) rather than running the facing the chance of assignment on the contract next week.