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Retirement Funds: Betterment vs Vanguard Life strategy vs Target Retirement
Life Strategy funds are more appropriate if you want to maintain a specific allocation between stocks and bonds that doesn't automatically adjustment like the Target Retirement funds which have a specific date.  Thus, it may make more sense to take whichever Life Strategy fund seems the most appropriate and ride with it for a while unless you know when you plan to retire and access those funds. In theory, you could use Vanguard's Total Market funds,i.e. Total Stock Market, Total International, and Total Bond, and have your own allocations between stocks and bonds be managed pretty easily and don't forget that the fees can come in a couple of flavors as betterment doesn't specify where the transaction fees for buying the ETFs are coming out just as something to consider.