RE:RE:It's A Known Fact.Sadly any trade made at the bid price rather than the ask price adjusts the overall price down to that sale price. And it can be done with a trade of 1 share. But traders usually use blocks of 100 share so that they can argue they weren't trying to adjust the price intentionally... and because the system is structured around 100 share blocks which get filled faster than odd numbers and can thus assure the planned price movement.
wallyman wrote: Looking at the chart pjecan posted--Can somebody please explain to me how a 5 share trade can send a stock down a penny? I know being able to trade commission free has led to a lot of this happening but do not understand how such a small trade can do that to the price in either direction.