just double checking but isn't it correct that if one has funds in a vanguard taxable money-market (ie. VMMXX) fund in a roth ira, since there are no taxes if held 5 years and after 59.5 years, it makes no difference versus a tax-exempt money-market (ie. VMSXX) ?
since this is in a roth ira, there's no issue about the tax either way, so it's only a matter of better return in one money-market account versus the other?
or is there something else to be aware of?