What is the Best SP 500 mutual fund and why??

Question

What is the Best SP 500 mutual fund and why??

Answer 1

Best and Worst S&P 500 Index Funds by Cost

published by Smart Money, 07-25-2008

"The rock-bottom award goes to E*TRADE S&P 500 Index Fund (ETSPX), with a 0.09% expense ratio, no load and no 12b-1 fees."

Answer 2

Since any S&P 500 index fund simply tracks the S&P 500 index, the main difference between them is going to be expenses.  Vanguard usually has the lowest expenses, therefore it's a good bet that VFINX is "the best."