Looks like someone is accumulating.
It dived immediatly after the extension announcement - that, without an increase in the offer price - doesn't look like a valid reason for a dive to me.
So, I am of the opion that the price is being pushed down. High volume, close on the low.
I am long ZFX calls (not a truckload mind you), and expecting an upward move in the short term. No idea what will trigger that though.