I bought the shares for 410 and sold then for a lot less. I don't know of the "buying" of the stock was counted in the volume today since it happens way before the market opens, but the selling of the stock today did add to the volume. 100 shares isn't much, but if you had 1000's of contracts exercised yesterday, it adds up.
Thanks for the explanation - but since you bought and then sold, this wouldn't explain net buying pressure today for the stock.
Now, what about the person on the other side of the trade? Does he have 100 shares short in his account?