We'll examine two more popular ETFs, VFAIX and VOO, both of which track the S&P 500 Index. While they share the same ...

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"For example, the Vanguard 500 Index Fund is available in both ETF (ticker: VOO) and mutual fund (VFIAX) form," says Rodney Comegys, global head of Vanguard's equity indexing group. "Both offer ...