Most of the trading occurred in three blocks amounting to 2,800 shares, the lion share traded at 15.05/shr.
As soon as it was over, the bid jumped to 15.40 with no shares traded until the close. Then one share trades at 15.67 to set the final day's price.
let it go. market maker makes the market and does what s/he wants. welcome to America
Just remember, if they can cause an irregularity in a single day, they can have the same proportional impact over months.