unit trust
US /ˈjuːnɪt trʌst/
UK /ˈjuːnɪt trʌst/

1.
a form of collective investment, especially in the UK, where money from many investors is pooled to buy a range of investments, managed by a fund manager
:
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She invested her savings in a unit trust for long-term growth.
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Many people choose unit trusts for diversification.