Regulators say a ban or cap on exit fees would make it easier for investors to switch investment "platforms" - otherwise known as fund supermarkets. The fees, which can amount to hundreds of pounds, effectively tie investors to one provider, the Financial Conduct Authority (FCA) said. It has proposed a crackdown on these fees so investors can move money more freely. Billions of pounds is invested in retail investments and pensions. A considerable amount of those goes through so-called fund supermarkets, particularly since the financial crisis, so any change to fees would mark a considerable shake-up for the industry.

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