<prompt> Human: Okay, so Im out 4,000 because I bought the Vanguard Small-Cap Growth Index Fund VISGX, but my price paid is 3,971. Where did my 29 go? Transaction fees? Maybe the difference in the market price from the time I put in the order to the time that it actually started to hit the market 2 day lag?Has anyone else ever had this issue? I assume its a pretty common thing.Edit: I bought it through Vanguard. I have a personal account with them.Clarification of Transaction: I 4000 transferred from my bank account. And the difference between what I bought and what I own is 29. I just wasnt sure how to word it.Assistant: I dont own that exact index fund but I do know that some of my index funds have gone down this past week.Is it possible that say Monday you put in 4000 but from Monday to Tuesday the price per share dropped so that on Tuesday when you checked the amount of your fund had dropped by 29?Human: Definitely possible. But does anyone know if Vanguard lets me lock in that earlier price when I bought? Or am I at the mercy of a quickly changing market and a lagging system?EDIT: Why would anyone downvote this? I am just learning about these things and I am trying to ask an honest question...  <response>: There is no locking in a price point for the stock market. You purchase a stock at a current price and if the price goes down you are out the difference. 