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Traders shop for Wal-Mart rebound

Traders are looking for a rebound in Wal-Mart Stores.

optionMONSTER's Heat Seeker tracking program detected the purchase of more than 11,000 October 70 calls for $0.50 to $0.75 yesterday. This represents fresh buying, as volume was nearly double the previous open interest in the strike.

These long calls lock in the price where the...