Largest option trades in equities

David Russell (

Nearing the halfway mark in today's session, here are the individual equity names with the most call and put buying on optionMONSTER's ActionTracker data system.

Host Hotels & Resorts (HST): Some 4,600 October 17 puts were bought for $0.10 to $0.15 as investors brace for the stock to fall before the end of the week. HST fell 0.78 percent to $17.77.

Star Scientific (STSI): Almost 4,000 January 3.50 calls were purchased for $0.10 and $0.15 as investors position for upside in the share price. STSI rose 9.13 percent to $2.51.

T. Rowe Price (TROW): An investor sold 1,700 October 75 puts and bought an equal number of November 75 puts, rolling a bearish position for a cost of $1.15. They now have an additional month of downside exposure and can profit from a poor earnings report on Oct. 24. TROW fell 0.78 percent to $74.08.

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