Quote from S2007S:
From Etfdigest.com
Adding to what might be a bullish week is how options series are presented courtesy of our friend Scott Larison of Forefront Capital in NY.
"Large call imbalance points to an up-market this week:
As of close on 11 Dec 2009, the S&P500 front-month (18 Dec 2009) option contracts have a $103.5 billion delta (exercise probability) weighted open interest towards calls. This is the fourth largest call imbalance seen one week prior to triple witching option expiration since September 1997.
Strikes with the largest Open Interest as of Friday's close 12/11:
DEC 1050- Calls 209k, Puts 221k
DEC 1100- Calls 181k Puts 166k"