<prompt> Human: I am in my mid-30s preparing to open a ROTH IRA I know, wish i had opened one sooner and opening with 5,500. I need help on what would be a good mixture for asset allocation given my age? plan on contributing 5,500 every year after. This is brand new territory for me, so I apologize if I left any other information and happy to respond with more information if needed. Thanks!Assistant: Vanguard target date fund fits the bill perfectly.Human: ELI5, what is this and how i choose it when opening the account, thank you for your reply!  <response>: Come on man you have to do a little research on your own too. This is your financial future. Type in Vanguard Target Retirement into google and go to the first link. The page has everything you need to know and even has a link to open an account. 