<prompt> Human: I already have a Roth IRA where I currently have my funds invested in a target date fund for around the time I turn 65, as my belief was that this is a standard time to retire. Im now in the process of setting up my 401k, and since target funds work best if all your savings are in the same one or rather, in a target fund planning to end the same year, I should pick the same one for the 401k. Its also worth adding that I dont know enough about investing at this point to do anything besides a target dateindex fund.As stated in the title, Im 23. My estimate that Ill retire at 65 is a total guess. Ive run numbers, and depending on how the market performs and how consistent my contributions and income are likely to be over the course of my career, I could be in a spot to retire anywhere between 45 and 70 70 is the absolute, worst-case scenario - 55 seems the most likely, based on financial predictions and career aspirations. How do I pick a target date fund since there is such a wide range of years I might be retire in? Obviously as time goes on the range should narrow, but for now am I best picking the furthest out fund, since it will have the highest risk tolerance and I have time to make it up if need be?  <response>: You should pick a target date fund with an asset allocation and glidepath you are comfortable with. The dates are just an indicator of how much they will be allocated towards stocks and bonds. 