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Is there any reason to choose my bank's index fund over Vanguard?
Basically, no.  Selecting an actively managed fund over a low-fee index fund means paying for the opportunity to possibly outperform the index fund. A Random Walk Down Wall Street by Burton Malkiel argues that the best general strategy for the average investor is to select the index fund because the fee savings are certain. Assuming a random walk means that any mutual fund may outperform the index in some years, but this is not an indication that it will overall.  Unless you have special information about the effectiveness of the bank fund management (it's run by the next Warren Buffett), you are better off in the index fund. And even Warren Buffett suggests you are probably better off in the index fund: This year, regarding Wall Street, Buffett wrote: “When trillions of dollars are managed by Wall Streeters charging high fees, it will usually be the managers who reap outsized profits, not the clients. Both large and small investors should stick with low-cost index funds.”