That's good that you spotted it during the day. I've only seen this after hours. But maybe you have some mm's or someone just trade the same shares back and forth to each other over market to help keep the price up. They don't lose any money doing it and it affects what the rest of us see as a price. Can't support the price indefinitely but might cause it to go up more than it goes down, which is important if you're holding a lot of it.