How to Choose a Gold ETF Using the Bogleheads Framework

Gold ETFs that track the Bogleheads philosophy

The Bogleheads approach to gold is to own physical gold through an ETF that holds actual metal in a vault, costs as little as possible, and does not try to beat the market. Two ETFs meet this standard: GLD (SPDR Gold Shares) and IAU (iShares Gold Trust). Both hold physical gold bars, charge roughly 0.4% per year in fees, and track the spot price of gold closely. Most Bogleheads who own gold choose one of these two.

The choice between them comes down to size and personal preference rather than performance. GLD is larger and more widely held, which means tighter bid-ask spreads (the difference between what you pay to buy and what you get to sell). IAU costs slightly less to own over time if you hold for decades, though the difference is small enough that either choice works. If you already have accounts at a brokerage that favors one over the other, start there.

Key Takeaways

• GLD and IAU are the two gold ETFs that match the Bogleheads philosophy of low cost, physical backing, and no market-beating claims.
• Both charge around 0.4% annually and hold actual gold in vaults, so the difference in long-term returns will be negligible.
• GLD is larger and has tighter spreads, making it easier to buy and sell without paying extra; IAU has a marginally lower expense ratio.
• Bogleheads typically hold gold as a small portfolio anchor (5 to 10 percent) for diversification, not as a speculation or hedge.

Why Bogleheads own gold at all

The Bogleheads philosophy, built on the work of Vanguard founder John Bogle, emphasizes low-cost diversification and long-term holding. Gold does not fit neatly into that framework because it produces no dividends, no earnings, and no cash flow—you own it only because you hope to sell it later for more. Yet many Bogleheads hold a small amount anyway, typically 5 to 10 percent of a portfolio.

The reason is that gold moves differently than stocks and bonds. When stock markets fall sharply, gold often holds its value or rises. This uncorrelated movement can reduce portfolio volatility without requiring you to predict markets or time trades. An ETF lets you own this diversification benefit without storing physical bars, paying insurance, or dealing with purity and weight verification.

GLD versus IAU: the real differences

GLD (SPDR Gold Shares) is the larger fund, with more assets under management. This size advantage means the bid-ask spread—the cost you pay when you buy or sell—is usually tighter. If you are trading through a regular brokerage account, you will pay less to enter and exit GLD than a smaller fund. GLD's expense ratio is 0.40% per year.

IAU (iShares Gold Trust) charges 0.19% per year, roughly half of GLD's fee. Over 30 years, this difference adds up: on a $10,000 position, you would pay roughly $600 more in fees with GLD than with IAU. However, GLD's tighter spreads can offset some of this advantage, especially if you trade frequently or hold a smaller position. For a buy-and-hold investor with a large position, IAU's lower fee wins. For someone trading smaller amounts, GLD's liquidity may matter more.

Both funds hold physical gold in vaults and publish audits of their holdings. Both track the spot price of gold closely. The difference in actual returns over time will be small enough that either choice is defensible.

How much gold to hold in a Bogleheads portfolio

There is no single "correct" amount. The Bogleheads community discusses gold holdings ranging from zero (gold is unproductive and unnecessary) to 10 percent (a meaningful diversifier). Most who own it settle between 5 and 10 percent of their total portfolio. The idea is that gold is a small anchor, not a core holding.

Your own allocation depends on your comfort with volatility and your belief in gold's diversification benefit. If you are young and can tolerate stock market swings, you may not need gold at all. If you are near or in retirement and want to reduce portfolio swings, a small gold position may help. The Bogleheads philosophy says to decide this once, based on your situation and risk tolerance, then hold it steady rather than trading in and out.

How to buy a gold ETF through a brokerage

Buying GLD or IAU is the same as buying any stock ETF. Open an account at a brokerage (Vanguard, Fidelity, Charles Schwab, or others), fund it, and search for the ticker symbol. Enter the number of shares you want, choose a market order (buy at the current price) or a limit order (buy only if the price drops to a level you set), and confirm. The trade settles in two business days, and the shares appear in your account.

You can hold gold ETFs in a regular taxable brokerage account, an IRA, a 401(k) if your plan allows it, or any other account type. There are no special rules or restrictions. You receive no dividends or distributions because gold produces no income—you simply own the shares and watch the price move with the gold market.

Why not other gold ETFs

Other gold ETFs exist, including leveraged funds (which try to move twice as fast as gold prices) and inverse funds (which profit when gold falls). The Bogleheads philosophy rejects these because they add cost, complexity, and the temptation to time the market. Leveraged and inverse funds also decay over time if held for years, meaning you lose money even if gold prices stay flat.

Some gold ETFs hold gold futures contracts or other derivatives instead of physical metal. These introduce counterparty risk (the risk that the other side of the contract fails to pay) and tracking error (the fund's price drifts from the actual gold price). GLD and IAU avoid both by holding the metal itself.

Rebalancing a gold position over time

If you decide to hold 7 percent of your portfolio in gold, that percentage will drift as your stocks and bonds rise or fall. Once a year, or when the drift exceeds a few percentage points, you can rebalance by selling some of your best-performing assets and buying more of the lagging ones. This forces you to sell high and buy low without requiring you to predict markets.

For example, if gold falls and now makes up only 5 percent of your portfolio instead of 7 percent, you would sell some stocks and buy more gold to bring it back to 7 percent. If gold rises and becomes 9 percent, you would sell some gold and buy stocks. This mechanical approach is core to the Bogleheads method and works whether you own gold, bonds, or any other asset class.

Frequently Asked Questions

Is gold a good investment for retirement?

Gold does not produce income, so it is not a core retirement holding. However, a small amount (5 to 10 percent) can reduce portfolio swings because gold often moves opposite to stocks. Whether you need that reduction depends on your age, other assets, and how much volatility you can tolerate. Many Bogleheads skip gold entirely and rely on bonds for stability instead.

Should I buy GLD or IAU?

If you hold a large position and plan to buy once and hold for decades, IAU's lower fee (0.19% versus 0.40%) saves money over time. If you trade smaller amounts or want the tightest bid-ask spreads, GLD's larger size and liquidity may matter more. Either choice is sound; pick one and stick with it rather than switching back and forth.

Can I hold gold ETFs in a retirement account?

Yes. Gold ETFs work in IRAs, 401(k)s, and other tax-advantaged accounts just like any other ETF. Some 401(k) plans do not offer gold ETFs in their investment menu, so check your plan's options first. If your plan does not include gold, you can hold it in an IRA instead.

What if the gold ETF company goes out of business?

Your shares are held in your brokerage account, not by the ETF company. If the ETF closes, your shares are transferred to another fund or you receive the cash value. The physical gold in the vault is held in trust for shareholders, so it cannot be seized by the ETF company's creditors. Your brokerage account itself is insured by the SIPC (Securities Investor Protection Corporation) up to $500,000 per account type.

How do I know if gold is actually in the vault?

Both GLD and IAU publish regular audits of their gold holdings, available on their websites. The gold is stored by third-party custodians (Brinks for GLD, Scotiabank and others for IAU) and inspected independently. You can read the audit reports yourself, though most investors simply trust the published numbers and the regulatory oversight that comes with holding an ETF.