Lennar (LEN), a homebuilder, is up 41 cents to $13.27 on the heels of today’s better-than-expected existing home sales numbers. Options volume is running 2X the average daily, led by sellers of Jan 2010 calls at the 13 line. Some might have been buy-writes, as blocks that hit bid-side for 65 cents midday coincided with blocks of shares around $13.10.