Sprint Nextel (S) shares are up a nickel to $4.39 and have now added 12.5 percent since Monday. Some players might be worried that the gains won’t last, as a block of 20K Sep 4 puts recently traded at the 4-cent ask price. It might be a closing trade. Meanwhile, 8,000 Jan 4 puts also changed hands, including 4000 at the 38-cent ask and 4,000 at 37 cents. The Jan 4 puts look opening and marked “tied”, so possibly a protective put or volatility play. Implied volatility in Sprint is down 4 percent to 48.5 today, compared to a 52-week high and low of 87 and 46.5.