A comprehensive overview of mutual funds and its role in the global economy.
Educational content only — not personalized financial, legal, or tax advice.
A mutual fund is an open-end professionally managed investment vehicle that pools money from multiple retail and institutional investors to purchase a diversified portfolio of stocks, bonds, or short-term money market instruments. Governed in the United States by the Investment Company Act of 1940, mutual funds allow individual investors to access professionally managed, diversified portfolios. Global mutual fund assets under management reached $60 trillion in 2023, holding significant shares of equity and fixed-income markets worldwide.
Mutual funds issue shares that investors purchase directly from the fund or through intermediary financial advisors. Unlike publicly traded stocks that trade continuously throughout market hours, open-end mutual funds calculate their price once per day after major financial exchanges close, typically at 4:00 PM Eastern Standard Time. This price is designated as the Net Asset Value (NAV) per share.
NAV is calculated by subtracting total fund liabilities from total fund assets and dividing the result by the total number of outstanding shares. When investors buy or redeem fund shares, transactions execute at the next calculated NAV. Open-end funds continuously issue new shares when investors deposit capital and cancel shares when investors redeem capital, requiring portfolio managers to maintain liquid cash reserves to meet daily investor redemptions.
Mutual fund costs are measured by the annual expense ratio, which covers management fees, administrative overhead, and distribution expenses. Actively managed funds employ portfolio managers to pick stocks, charging expense ratios ranging from 0.50% to 1.50% annually. Passively managed index funds replicate market benchmarks, offering expense ratios as low as 0.02% to 0.10%.
Investors select funds based on asset class exposure, including large-cap equity funds organized by total market capitalization, active stock market trading strategies, or fixed-income portfolios holding corporate bond assets. Specialized funds focus on specific industries through sector investing frameworks. Mutual funds serve as primary investment vehicles in corporate pension portfolio allocations, helping individual investors achieve systematic asset diversification.