Calpine shares are up 10c to $11.05 and option volume is 3x the daily average being driven by block trade in LEAPs as the $12.50 calls Jan 2011 trade 5,000 contracts were bought for $1.10 and then in then 3,000 contracts (now total of 5,000) of the $12.50 calls with the 2012 expiry traded at $1.90 a contract. Both appear to be opening; checking as to whether this was spread sale.