The No. 2 most popular fund on planet is ‘SPY’

Related: The 5 hottest ETFs in the world

It’s cheap! The other great benefit of SPY is how cheap it is. The fund charges a mere 0.11%, far lower than a typical mutual fund.

Most ETFs have significantly lower fees than mutual funds because ETFs usually mimic the stocks in an index — in SPY’s case the S&P 500. There’s no need to pay someone a hefty salary to select stocks.

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