vanguard 500 index fund admiral shares vanguard 500 index fund admiral shares vanguard 500 index admiral vfiax 5 best s p 500 index funds of november s p 500 index efficiently mutf vfiax s p 500 index efficiently mutf vfiax vanguard s p 500 growth etf best the 4 best vanguard retirement funds vanguard 500 index fund admiral shares the vanguard 500 index fund turns 40 vfiax vanguard detail voo vs vfinx vs vfiax how do you choose