I understand this. By why today? Why not tomorrow or on Monday? Is this just the way it is, or is there a better explanation? Although there was a gradual decline in volume leading up to today, the Thursday the week before expiration always shows a HUGE decline. I was just trying to see if there was a more specific explanation.
Sar, It might be one of those unexplained mysteries. Kind of like, if New Years celebrates how many years ago Jesus was born, then why aren't Christmas and New Years the same day?