Looking at the VDSI chart for today, there's a volume bar that shows up 6 seconds after the market closes for 125,000+ shares.. Of that 125K, 68,000 was in a single block.

And yet there was no price action up or down.

How is that possible? Did these shares come from thin air?


Add to this question, I frequently see large volume bars at the close of each day with very little price action in the candle. Can someone explain this?