$Meta Materials (MMAT.US)$ whoa, that's some large orders

18423940 : Almost all the stocks have such large orders at 16:00 hours.
Can anyone explain to me, why such large orders never moved the market prices?

18423940 18423940: My thought is these are the amount of shares borrowed from market makers, and returned to them at the end of the day at the current price.  So nobody was "buying" such amount of shares, just the amount of money that shorts paying for the shares they borrowed.

18423940 18423940: Any other explainations?

ahliao : Suspect is institutional investors or shorts covering

102165633 : could be institutional investors

102165633 ahliao: since shorts cant trade yet