Nearing the halfway mark in today's session, here are the individual equity names with unusual option activity on optionMONSTER's ActionTracker data system.

Scientific Games (SGMS): An investor sold 1,600 July 15 calls for $1.65 and purchased 2,000 August 17 calls for $1.45. Volume was below open interest in the nearer-dated contracts, which indicates an existing position was rolled forward in time. SGMS rose 1.97 percent to $16.54.

Rackspace Hosting (RAX): Traders purchased about 2,200 July 37 calls for $0.30 and $0.35, looking for upside in the share price. RAX rose 2.24 percent to $36.57.

Acadia Pharmaceuticals (ACAD): Investors sold 1,500 January 40 calls for $8.70 and bought 1,900 January 45 calls for $6.30, increasing the size of a long position and rolling it higher in price. ACAD rose 1.64 percent to $44.66.


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