Mutual Fund
By WikiWealth Editorial Team|Last updated:
Key Takeaways
- A mutual fund pools money from many investors to invest in a diversified portfolio of stocks, bonds, or other securities
- Mutual funds are priced once daily at their net asset value (NAV) after the market closes
- They can be actively managed (seeking to outperform a benchmark) or passively managed (tracking an index)
- Key costs include expense ratios, sales loads, and potential capital gains distributions
Definition
A mutual fund is a pooled investment vehicle that collects money from many investors to purchase a diversified portfolio of stocks, bonds, or other securities. Professional fund managers make investment decisions on behalf of shareholders according to the fund's stated objectives. Mutual funds provide individual investors access to professionally managed, diversified portfolios that would be difficult or expensive to build independently.
How It Works
Investors buy shares of a mutual fund at its net asset value (NAV), which is calculated once per day after the market closes. The NAV equals the total value of the fund's holdings minus liabilities, divided by the number of shares outstanding. When you invest in a mutual fund, your money is pooled with other investors' capital and invested according to the fund's strategy. Mutual funds come in many varieties: stock funds, bond funds, balanced funds, money market funds, index funds, sector funds, and more. They charge an annual expense ratio (typically 0.05% to 1.5%) and may charge sales loads (front-end or back-end commissions). Mutual funds are required to distribute capital gains and dividends to shareholders, which creates tax implications in non-retirement accounts.
Example
An investor puts $10,000 into a large-cap growth mutual fund with a 0.75% expense ratio. The fund holds 80 stocks selected by the portfolio manager. Over one year, the fund's NAV grows from $50 to $55 per share (10% return). The investor's $10,000 grows to $11,000 before fees. The expense ratio costs $82.50 (0.75% of the average balance), leaving a net gain of approximately $917.50. If the fund also distributes $300 in capital gains, the investor owes taxes on those gains even if they reinvested them.
Why It Matters
Mutual funds hold over $25 trillion in U.S. assets and remain the primary investment vehicle in most 401(k) and retirement plans. They democratized investing by giving ordinary individuals access to diversified, professionally managed portfolios. However, the rise of lower-cost ETFs has put pressure on actively managed mutual funds, particularly those that charge high fees without consistently outperforming their benchmarks. Research consistently shows that the majority of actively managed mutual funds underperform their benchmark index over long periods after fees.
Advantages
- Professional management by experienced portfolio managers
- Instant diversification across dozens or hundreds of securities
- Accessible with relatively low minimum investments (often $1,000 to $3,000)
- Highly regulated with strong investor protections and transparency requirements
Limitations
- Higher expense ratios than comparable ETFs, especially for actively managed funds
- Capital gains distributions create tax inefficiency in taxable accounts
- Can only be traded once daily at the closing NAV, lacking intraday flexibility
- Most actively managed funds fail to outperform their benchmark index over long periods
Frequently Asked Questions
Related Terms
Browse more definitions in the financial terms glossary.