please explain, page-2

I'm guessing you've stumbled upon bot trading wealthy...

they are automated programs which accumulate or sell amounts (which can be tiny) of shares based upon a pre-defined algorithm...

investment banks and other financial institutions tend to use them, due to:

1) doing so allows the buyer or seller to accumulate or sell the number of shares they wish without affecting the price (hence the buyer/seller buys or sells at the price they want

2) generally they have far lower brokerage costs than the average retail investor, hence can afford such tiny packages many times over