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• Largest option buying in equities so far
• Index, ETF option volumes near midday
• Call seller sees cap on Caterpillar upside

• BAC 71% Rate It
• EMC 80% Rate It
• LBTYA 100% Rate It

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.

Liberty Global (LBTYA): A trader purchased 25,000 January 60 calls were purchased for $1.95. A large block of shares was sold around the same time, indicating the use of a so-called delta-neutral strategy which profits from increased volatility rather than a move in a specific direction.
LBTYA rose 2.58 percent to $59.18.

Bank of America (BAC): More than 23,000 October 8 calls were purchased, mostly for $1.32 to $1.35, as investors look for upside in the share price. BAC rose 0.05 percent to $9.20.

EMC (EMC): More than 33,000 April 25 puts were bought, mostly for $1.39 to $1.41. A similar number of October 25 puts were sold at the same time against open interest, indicating that a protective position was rolled forward in time. EMC rose 1.74 percent to $28.

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