An open ended mutual fund is an investment vehicle that continuously issues and redeems shares based on investor demand. Unlike closed-end funds, there is no fixed number of shares. Investors buy and sell shares directly from the fund at the Net Asset Value (NAV), which is calculated at the end of each trading day.
This is by far the most common type of mutual fund. When most people say “mutual fund,” they’re referring to an open-ended fund.
How Open Ended Funds Work
|
Feature |
How It Works |
|---|---|
|
Share creation |
New shares are created whenever investors buy in |
|
Share redemption |
Shares are cancelled when investors sell |
|
Pricing |
NAV calculated once daily at market close |
|
Liquidity |
Investors can buy or sell on any business day |
|
Minimum investment |
Typically $500-$3,000 for most retail funds |
|
Management |
Can be actively managed or passively indexed |
NAV Formula:
> NAV = (Total Assets − Total Liabilities) / Total Shares Outstanding
Open Ended vs Closed Ended Mutual Funds
|
Feature |
Open Ended |
Closed Ended |
|---|---|---|
|
Shares outstanding |
Unlimited – changes with demand |
Fixed at IPO |
|
How you buy |
Directly from fund at NAV |
On stock exchange like a stock |
|
How you sell |
Fund redeems at NAV |
Sell to another investor on exchange |
|
Pricing |
Exactly at NAV (daily) |
Can trade at premium or discount to NAV |
|
Liquidity |
High – always redeemable |
Depends on trading volume |
|
Popularity |
Very high |
Much less common |
The key distinction: in a closed-end fund, you buy and sell shares from *other investors* on an exchange, not from the fund itself. This means the price can deviate from the underlying NAV.
Types of Open Ended Mutual Funds
|
Fund Type |
What It Invests In |
|---|---|
|
Equity funds |
Stocks (growth, value, large-cap, small-cap, sector) |
|
Bond funds |
Government, corporate, or municipal bonds |
|
Balanced funds |
Mix of stocks and bonds |
|
Money market funds |
Short-term, high-quality debt instruments |
|
Index funds |
Tracks a market index (S&P 500, etc.) |
|
Target date funds |
Automatically adjusts allocation as target date approaches |
|
International funds |
Stocks or bonds from non-US markets |
Key Fees to Understand
Fees significantly affect long-term returns – always compare expense ratios before investing.
|
Fee Type |
What It Is |
Typical Range |
|---|---|---|
|
Expense ratio |
Annual management fee as % of assets |
0.03%-1.5%+ |
|
Front-end load |
Sales charge when buying shares |
0%-5.75% |
|
Back-end load (CDSC) |
Sales charge when selling (declining over time) |
0%-5% |
|
12b-1 fee |
Marketing/distribution fee (included in expense ratio) |
0%-1% |
|
No-load fund |
No sales commissions |
N/A |
Index funds from Vanguard, Fidelity, and Schwab typically have expense ratios under 0.10% – far lower than actively managed funds, which average 0.5%-1.0%+.
How to Invest in an Open Ended Mutual Fund
- Open a brokerage account (Fidelity, Vanguard, Schwab, or similar)
- Research funds by category, performance history, expense ratio, and minimum investment
- Place a purchase order – funds execute at that day’s closing NAV
- Monitor performance relative to relevant benchmarks quarterly
The Bottom Line
Open ended mutual funds are the foundation of most retirement portfolios – accessible, liquid, and available in every asset class and style imaginable. The most important decision is choosing funds with low expense ratios, since fees compound against you over decades just as returns compound for you. For most long-term investors, low-cost index funds in the open-ended structure are the most efficient vehicle available.
