<prompt> Human: I have been watching this lately and it goes 15.80 then back down to 15.30 or so. It is held by Fidelity, but I can make my own elections. Can I sell when it hits 15.80 then buy back in at 15.30 or would my only option be to change my elections, hope whatever I put it in stayed stable then change my elections back when the price went down.Is this the most stupid question you have ever heard?EDIT: 401K  <response>: You can, but attempting to time the market is going to lose you a lot of money. 