RE:Any index experts on this board?Hey pops, hope you're having a good day. TSX will allow index providers a type of trade called "Market on Close". Last time this happened was at exactly EOD 4:30 PM on May 31. I believe some 30M shares changed hands in a nano-second.
https://www.tsx.com/trading/tsx-venture-exchange/order-types-and-features/market-on-close