So? It's after hours trading. Its silly to pretend that it's a real 6 percent boost. Let's see the price tomorrow. Thats when you can say this is a legitimate spike.
Are there any studies on after-hours movement vs gap return?
I've seen gap-fill studies on big moves in general but never one specific to AH moves.
It's possible much of this move was short sellers who chose to cover AH today. It's also possible that there's a lot of smart money buying AH and we'll see it grind higher tomorrow.