GLDM vs IAU: Weighing Lower Costs Against Liquidity in Gold ETFs

Key Takeaways

• Both GLDM and IAU are physically backed gold bullion trusts that seek to track the LBMA Gold Price, offering nearly identical price exposure to the metal itself.
• GLDM is the more cost-efficient vehicle with a 0.10% expense ratio, while IAU charges 0.25%.
• IAU is the larger and more established fund, with a launch date of January 2005 and meaningfully greater assets under management (AUM), while GLDM launched in June 2018.
• Both funds hold essentially 100% gold (with a small cash position), pay no dividend, and carry no equity, bond, or sector tilts.
• The structural differences center on cost, fund size, and track record rather than on exposure, risk profile, or underlying holdings.
• Long-term investors may favor GLDM for its lower fees, while scale-sensitive traders and institutions may lean toward IAU for its deeper liquidity.

Why These Two Gold ETFs Stand Out

Gold-backed ETFs have become a mainstream tool for portfolio diversification, inflation hedging, and safe-haven positioning. Within this category, GLDM and IAU are frequently compared because they target the same objective — tracking the price of physical gold — yet differ in cost structure and scale. This ETF comparison is especially relevant today, as elevated macro uncertainty, shifting interest rate expectations, and persistent demand from central banks and retail investors keep gold in focus. Understanding the structural differences between these two funds helps investors select the vehicle that best matches their cost sensitivity, trading needs, and holding horizon. I also checked this using Tickeron’s AI Screener to see how the two compare on key metrics.

A Closer Look at SPDR Gold MiniShares Trust (GLDM)

The SPDR Gold MiniShares Trust (GLDM) is a physically backed grantor trust that seeks to reflect the performance of the price of gold bullion, less expenses. It tracks the LBMA Gold Price (the London Bullion Market Association's benchmark gold price, set in U.S. dollars). Launched on June 25, 2018, GLDM was designed as a cost-effective alternative to the larger and more expensive SPDR Gold Shares (GLD), offering comparable exposure at a lower price point.

The fund holds essentially a single asset — allocated physical gold bullion stored in secured vaults — with a negligible cash balance for expenses. Its portfolio is therefore approximately 100% gold, with no equity, fixed-income, or sector allocation. The net expense ratio is a very low 0.10%. GLDM is a passive vehicle that does not engage in active trading or rebalancing; its holdings simply rise and fall with the quantity of bullion held in trust, which is adjusted as shares are created or redeemed by authorized participants.

A Closer Look at iShares Gold Trust (IAU)

The iShares Gold Trust (IAU) is also a physically backed grantor trust that seeks to reflect the performance of the price of gold bullion. Like GLDM, it tracks the LBMA Gold Price. Launched on January 21, 2005, IAU is one of the oldest and largest gold ETFs in the market, giving it a long track record and deep trading liquidity.

IAU's portfolio is similarly concentrated in allocated physical gold held in vaults, with gold representing essentially 100% of assets and a minimal cash position. Its expense ratio is 0.25%, higher than GLDM's but still inexpensive compared with many other commodity and precious-metals products. IAU is a passive vehicle with no active management or periodic rebalancing; its structure is governed by a trust agreement and adjusted through share creation and redemption. Both funds are structured as grantor trusts rather than as funds registered under the Investment Company Act of 1940, which has tax and regulatory implications for investors.

The Broader Gold Market Context

Gold's investment case has strengthened over recent market cycles as a hedge against inflation, currency depreciation, and geopolitical risk. Central bank purchases have been a sustained source of demand, while lower real interest rates generally reduce the opportunity cost of holding non-yielding bullion. These forces have supported gold prices and, by extension, the sector exposure delivered by physically backed funds like GLDM and IAU.

At the same time, gold remains a volatile asset in its own right. Prices can fall sharply when real yields rise, the U.S. dollar strengthens, or risk appetite returns. Investors should also note that these grantor trusts pay no dividend and generate no income, so total return depends entirely on price appreciation. For both funds, the relevant risks are concentrated in a single commodity rather than diversified across sectors or issuers.

How the Two Funds Stack Up on Performance

Because GLDM and IAU track the same benchmark and hold the same underlying asset, their relative positioning and returns have been nearly identical in recent weeks and over recent market cycles. The primary performance differentiator is the expense ratio: GLDM's 0.10% fee versus IAU's 0.25% fee means GLDM has typically delivered a slightly higher net return over time, all else being equal, with the gap compounding over longer holding periods.

On volatility and risk, the two funds are essentially interchangeable. Both exhibit low beta relative to the broader equity market and offer pure commodity exposure with no company-specific or mining-sector risk. The meaningful differences are structural rather than performance-driven: IAU's larger AUM and longer history support deeper liquidity and narrower effective trading spreads, while GLDM's lower cost and lower share price make it accessible to cost-conscious and long-term investors seeking to minimize fee drag on fund performance.

Using Tickeron’s AI Tools in My Research

I’ve found Tickeron’s AI Screener to be a practical way to quickly filter gold-related ETFs and compare expense ratios, AUM, and liquidity metrics side by side. It surfaces relevant candidates efficiently and helps refine a shortlist without manual effort, which is useful when evaluating vehicles that deliver nearly identical exposure.

Disclaimer

The information on this webpage is provided for general informational and educational purposes only and is not intended as investment advice, a recommendation to purchase or sell any security, or an offer or solicitation related to investments. It does not consider your personal financial situation, goals, or risk profile, and all investing carries inherent risks, including the possibility of losing your entire investment. For more details, please review our full disclaimer.

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Contributor

Allana|Expert

Financial analyst and market blogger with expertise in equity research, fundamental analysis, and macroeconomic trends. I regularly publish coverage on individual stocks, ETFs, and sector developments — combining rigorous financial analysis with clear, engaging writing for a broad investment audience.

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