Zeev - this may answer your question - posted by Todd Harrison at his site minyanville.com:
The flow has quieted down some although a pretty meaty QQQ put spread just traded. A customer bought 90,000 January 33 puts and sold 90,000 January 30 puts. That creates a bean and a half QQQ for sale (1.5 million) as the dealer gets hedged. Odd lot!
Hope that helps - great site by the way, nice independent thinking