What do you mean by stock fund? Equity funds refer to funds that invest in equity assets such as stocks and equity funds. Stocks are equity commodities, and holding company stocks gives you the right to share the company's profits, so stock funds usually refer to funds that invest in the form of dividends. Equity investment includes: stocks, securities investment funds and partial stock funds. Only fixed-income funds are not equity funds, such as capital preservation funds, bond funds and money funds.