I think that was discussed the other day by others here. The trade afterhours is someone that put in an order during the day using the VWAP method. That stands for Volume Weighted Average Price. So, let's say you want to buy, but you are concerned your buy at the high of the day and then if falls. You can put in an order using VWAP. So they take the average price throughout the day, using volume at the different price points, and come up with a VWAP. You could be getting a deal, or you could be getting abused. As an example, say the price range is $2.50-$3 for the day. The price is at $2.60 when you want to buy, but that is the high of the day at the time. You could put in a VWAP and if the stock were to go down, you might get filled at lower than the $2.60 at the end of day. However if the price keeps going up, you would get filled at a higher price, but if that is the case, then most likely the share price is still higher than that, so you should be in the money. Another reason to use VWAP is because of the size of the order. You put in an order for 40K shares, and you probably won't get filled and have to chase the price up. With the VWAP, the MM goes to work accumulating the shares throughout the day and fill you at the VWAP at the end of the day.
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on a different topic, could the selling after hours have anything to do with shares being sold at a discount (per an old pr about note holders and discounts) just asking, because I honestly don't know what the reason for tge dip after hours every day, that doesn't effect share price at tge open.