US Steel (NYSE: X) volatility Up on unconfirmed chatter that Atticus is building stake. X is recently down $3.18 to $89.49. Unconfirmed chatter is circulating that Atticus Capital has acquired a 10% stake in X. X September option implied volatility of 45 is above its 26-week average of 38 according to Track Data, suggesting larger price fluctuations.

TiVo (NASDAQ: TIVO) calls active as TIVO trades near 10-month high. TIVO, a digital video recorder provider, is recently up 64 cents to $7.01. TIVO has a market cap of $682 million. TIVO September 7.5 calls have traded 25 times on transaction volume of 1,300 contracts above its open interest of 435 contracts. TIVO September option implied volatility of 57 is near its 26-week average according to Track Data, suggesting non-directional risk.

Brinker (NYSE: EAT) volatility up; EAT talking to investors about selling Macaroni Grill. EAT operates restaurant concepts including; Chili's, Macaroni Grill, Maggiono's & On the Border. Goldman Sachs says "EAT reported 4Q operating EPS of $0.57, ahead of our $0.47 estimate. The overage came largely from a lower tax rate, share count, and modest expense variance." Dow Jones reported EAT "is talking with a 'number of investors' about the possible sale of its Romano's Macaroni Grill chain." EAT September option implied volatility of 33 is above its 26-week average of 29 according to Track Data, suggesting larger risk.

Daily options Update is provided by Stock Specialist Paul Foster of theflyonthewall.com.