Thanks for that. They must pay dividend and amend ftse price at the same time.
I'm guessing if they didn't do it that way there is a lot of money to be made - the whole transaction (buy and sell with dividend grab) could be done within 3 or 4 minutes...
If I buy the FTSE100 on a spread betting site with the knowledge that a dividend is to be paid (Tuesdays for FTSE) and than close the position immediately the dividend payment is credited to my account will I incur additional charges. I do understand Dividend stripping but just curious...