ETFs vs Mutual Funds

A mutual fund (opens in new tab) pools money from many investors and uses it to buy a collection of securities: stocks, bonds, or both. You own shares of the fund, not the underlying securities directly. A portfolio manager (or an index algorithm) decides which securities to hold. Your return depends on how those holdings perform collectively, minus fees.

Here's the part that catches people off guard: mutual fund shares are priced once per day, after U.S. markets close. The price is called the net asset value, or NAV, which is the total value of the fund's holdings divided by the number of outstanding shares. Place an order to buy or sell at 2:00 p.m. and you don't know the exact price until the NAV is calculated hours later. You can't trade mutual fund shares throughout the day the way you can trade stocks.

Most mutual funds sold through employer retirement plans like 401(k)s are actively managed: a fund manager decides which stocks to hold, with the stated goal of beating a benchmark. Active management adds cost. The fund charges an expense ratio (an annual percentage fee drawn from the fund's assets), ranging from 0.50% to over 1.00% for actively managed funds. That fee comes out whether the fund beats the market or not. Decades of data show that most actively managed mutual funds trail their benchmark index after fees over long periods. This matters more than people think. Low-cost index mutual funds, which replicate an index rather than trying to beat it, have largely displaced actively managed funds as the default choice for long-term investors.

An exchange-traded fund (opens in new tab) works like a mutual fund in concept: it pools money from many investors to hold a basket of securities. The difference is how it trades. An ETF trades on a stock exchange throughout the day at market prices, just like an individual stock. Buy at 10:00 a.m., sell at 2:00 p.m., or hold for decades. The price fluctuates throughout the day based on the value of the underlying holdings and supply and demand for the ETF shares themselves.

Most ETFs track an index passively. A broad U.S. stock market ETF holds shares in hundreds or thousands of companies in proportion to their market value, aiming to match the index's performance rather than beat it. Minimal trading and research means low costs. Many index ETFs charge 0.03% to 0.10% annually, a fraction of what an actively managed mutual fund costs. Over decades, that cost difference compounds into a significant gap.

ETFs also have a structural tax advantage over mutual funds. When investors in a mutual fund sell their shares, the fund may need to sell underlying holdings to raise cash. That can trigger capital gains distributed to all remaining shareholders, even those who didn't sell. Unfair? Feels like it. ETFs avoid this through an in-kind creation and redemption process. ETF investors pay capital gains taxes only when they personally sell their shares, not when other investors in the same fund do. In taxable accounts, that's a meaningful advantage.

Cost. Index ETFs are cheaper than index mutual funds, and both are far cheaper than actively managed mutual funds. The difference between a 0.05% expense ratio and a 0.75% expense ratio is 0.70% per year. Sounds small. On a $50,000 account held for 20 years, that difference compounded reduces your ending balance by thousands of dollars. The fee runs every year, in every market condition, whether returns are positive or negative.

Taxes. In a taxable brokerage account, ETFs are more tax-efficient than most mutual funds because of the in-kind redemption mechanism described above. Inside a tax-advantaged account like an IRA or 401(k), this distinction largely disappears. Gains aren't taxed until withdrawal (traditional) or not at all (Roth). So if you're choosing between an index ETF and a comparable index mutual fund inside a retirement account, tax treatment isn't a meaningful differentiator.

Trading. ETFs trade throughout the day like stocks. Mutual funds price once daily. For long-term investors, intraday trading flexibility is rarely useful. But it does mean ETFs are easier to buy and sell at a specific price, which matters if you need liquidity on short notice.

Minimums. Many mutual funds require a minimum initial investment of $1,000 or more. ETFs? The price of a single share, and most brokerages now offer fractional shares, so the effective minimum is very low. For investors starting with small amounts, ETFs are more accessible.

The practical conclusion: a low-cost index ETF is a reasonable default for broad market exposure in a taxable account. A low-cost index mutual fund is equally fine inside a retirement account. Both are regulated under the Investment Company Act of 1940 and must publish their holdings, fees, and objectives in a prospectus. Actively managed mutual funds have a high bar to justify their costs, and the evidence that most clear it over long periods isn't strong.

All three Narstar portfolios are built from individual stocks, not ETFs or mutual funds. Deliberate choice. Real tradeoffs.

An index ETF buys every company in the index regardless of quality, valuation, or competitive position. We don't want to own every company. We want to own specific ones: dividend payers selected for cash flow in the Income portfolio, companies with durable competitive advantages in the Growth portfolio, and concentrated positions in smaller companies in the Speculative portfolio. That selectivity is the entire point.

But it comes at a cost, and the cost is concentration. Individual stocks concentrate risk in ways a broad index doesn't. If a single holding has a serious problem, it affects the portfolio more than it would in a 500-company index. The portfolios can underperform a broad market index for extended periods. They can lose more in a downturn if the specific companies held do poorly. Individual stock investing isn't inherently better than index investing. It's different: higher variance of outcomes in both directions.

On fees, we don't stack mutual fund expense ratios on top of an advisory fee. The only cost is the annual advisory fee: 0.60% for Income, 1.20% for Growth, 1.60% for Speculative. The holdings carry no embedded management fee because they are individual stocks, not funds. The homepage fee calculator shows the dollar amount at any balance.

Want broad, low-cost index exposure to hundreds of companies at once? An ETF through a robo-advisor or a self-directed brokerage account is likely the better fit. The robo-advisor vs. fee-only adviser article covers that comparison directly. Narstar is for investors who want specific companies selected and managed for them, with a clear fee and a human making the decisions.