Mast Therapeutics, Inc. (MSTX)

[AKAPAK]

This is only my guess, but when I see those thpe of trades above the close AH it is either:

1. An ordered filled during the course of the day, when it was in that range.

or

2. If it did not trade in that range (or only briefly / less volume), that an order was placed at that price and specialist but was doing their best to get shares at a lower price during the cay and finally closed it at the EOD, topping it off with whatever shares are left on the ask.

In particular, I have (higher than ask) limit orders close-out minutes after the bell, and then notice a large order posted.

Anyhow, these are some of my thought, right or wrong.