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How well off is your relationship with your adviser? American funds have fairly high expense ratios, and I wouldn't be surprised if your adviser was just trying to make money off you by suggesting these types of funds.

Assuming this account is for retirement only and you have no other accounts: If I were you, and wanted to keep things simple I would just move all my money to a Vanguard account and either buy a Target Retirement fund or go with a Total Market allocation based upon my age/risk tolerance. I would not be putting my retirement money in any other fund besides the aforementioned.