What are advantages of Index ETFs over Index Mutual Funds?
1) Listed and traded on the Exchange with real time NAV which enables you to know at what price you are buying the units unlike index mf units where you know your NAV at after the market hours.
2) Very cost efficient as annual expense ratio is 0.5% compared to 1.0-1.5% of other mutual fund.
3) ETFs have low tracking error compared to open ended schemes.
4) No portfolio churning expense i.e when a large institution investor come or goes out, you and your fund is incurring the transaction cost.
Hope that helps!!