Less than an hour later, lumber company Weyerhaeuser's October 30 calls traded more than 5,000 contracts, most of which priced for $0.25. Upside activity followed in cement giant Cemex, with almost 7,000 October 11 calls going for $0.63 to $0.68. Weyerhaeuser rose 2.7 percent to $28.51, and Cemex advanced 2.16 percent to $11.33.
Investors targeted home-improvement company Lowe's in another transaction. OptionMonster's scanners showed the purchase of 5,100 September Weekly 46 calls expiring this Friday for $0.47 and the sale of an equal number of Weekly 47 calls for $0.12. The strategy will control a move between the two strike prices for just $0.35, implying profit of almost 200 percent on a close above $47 five days from now. Lowe's fell 0.57 percent to $45.60.
Finally, after nibbling around the edges of actual home builders, traders targeted KB Home about halfway through the morning. This time they wanted a little more time and amassed more than 5,500 January 16 calls, with the biggest block fetching $2.26. KB Home ended the session up 2.14 percent to $16.24.
—By CNBC Contributor David Russell
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David Russell is a reporter and writer for OptionMonster. Russell has no positions in any of the companies mentioned in this article.