I hope you saw a trader's trick in the last few minutes before market close. About 3 minutes before the close, a trader dumped 400k shares at the market. It triggered some stop losses and pushed the price from $35.35 to $35.20. However, the same trader loaded most shares in the way down plus a big order of 800k around $35.20. This trader gained something around $40K in the last minute and accumulated twice of his orginal shares.