Okay, so the professional trader buys 700,000 shares at 2.9...

Okay, so the professional trader buys 700,000 shares at 2.9 cents and then Joe ******** sells his 175,000 shares 5 minutes later at 2.8 cents. This is a $175 loss. $350 loss compared to selling this morning at 3.0 cents and $875 loss compared to selling yesterday at 3.3 cents.
Anyone out there who can logically explain this!!!
Cheers.