Collusion among large banks has been well established. We have read about fines, and preventive measures time, and time again. Nothing has been able to stop it... The rewards for this kind of underhanded business are too great... How can the mkt move as it did right from the open, as you have noted, without a concerted effort by very large traders, banks... Retail traders can't move the mkt in this way...
Vincit qui se vincit.