IAUM vs OUNZ: Weighing Cost and Features in Two Gold ETFs

Key Takeaways

• Both IAUM and OUNZ are physically backed, single-asset gold ETFs that track the LBMA Gold Price, making them near-identical in exposure rather than structurally different strategies.
• The clearest structural gap is cost: IAUM charges a 0.09% expense ratio versus 0.25% for OUNZ, a meaningful long-term compounding difference for buy-and-hold investors.
• OUNZ holds a unique edge through its physical delivery option, allowing shareholders to redeem for allocated gold bars and coins, a feature IAUM does not offer.
• Both funds are grantor trusts and are not registered under the Investment Company Act of 1940, meaning neither provides dividends or income and both expose investors to pure gold-price volatility.
• On liquidity and scale, IAUM is the larger and more actively traded vehicle, with a tighter bid/ask spread that can lower execution costs.
• Tickeron AI Verdict: IAUM — its lower cost, superior liquidity, and identical gold-price tracking give it the structural edge for most investors.

Why These Two Gold ETFs Stand Out

Investors seeking direct exposure to gold increasingly weigh cost, liquidity, and optionality when choosing an exchange-traded product. IAUM and OUNZ sit at the center of this ETF comparison because they compete directly: both are physically backed, single-asset gold funds benchmarked to the same spot reference price. Yet beneath their shared objective lie meaningful structural differences in expense ratio, physical redemption rights, and trading characteristics. Understanding these nuances is essential for evaluating relative positioning, whether an investor prioritizes low fees, deep liquidity, or the rare ability to take delivery of actual bullion. I also checked this using Tickeron’s AI Screener to see how the two compare on key metrics.

IAUM Overview

The iShares Gold Trust Micro seeks to reflect the performance of the price of gold bullion, tracking the LBMA Gold Price before fund expenses. Launched in June 2021 by BlackRock, IAUM holds a single core asset — physical gold bars stored in vaults — making it a passive, grantor trust vehicle rather than a registered mutual fund. Its portfolio is effectively one holding, with essentially 100% of assets allocated to gold bullion in the precious metals/commodities sector.

The fund's defining feature is cost: at a 0.09% expense ratio, it is among the lowest-priced physical gold ETPs available. It pays no distributions and carries no derivatives exposure. As one of the larger and more liquid gold funds, IAUM typically posts a tight median bid/ask spread of about 0.02%, which can reduce transaction friction for active traders and long-term holders alike.

OUNZ Overview

The VanEck Merk Gold ETF, sponsored by Merk Investments LLC and marketed by VanEck, seeks to provide a convenient and cost-efficient way to buy and hold gold — with a distinctive twist. Like IAUM, OUNZ is a grantor trust whose holdings consist of a single asset: allocated London gold bars held by JPMorgan Chase Bank, benchmarked to the LBMA Gold Price. Its portfolio is essentially 100% allocated to gold bullion in the commodities sector, with no income or dividends.

What separates OUNZ is deliverability: investors can redeem shares for physical gold, including one-ounce coins, ten-ounce bars, and London bars, in a process structured to be non-taxable since it represents taking possession of already-owned gold. In exchange for this optionality, the fund charges a higher 0.25% expense ratio and generally trades with slightly less liquidity than the largest gold funds, having launched in May 2014.

Industry Context for Physical Gold Products

Both funds operate within the physical gold ETP market, a category shaped by demand for inflation hedges, portfolio diversification, and safe-haven positioning amid geopolitical and currency uncertainty. Central bank buying, shifts in real interest rate expectations, and U.S. dollar strength are recurring macro drivers that move the spot price both ETFs track. Because neither fund trades derivatives or uses leverage, their returns are driven entirely by gold-price appreciation or depreciation rather than sector rotation or earnings cycles.

Key risks include commodity-price volatility, concentration in a single asset, and regulatory nuances: as grantor trusts, these products are not subject to the same protections as 1940 Act funds. Recent market cycles have highlighted gold's role as a non-correlated store of value, sustaining steady investor capital flows into physically backed vehicles even as equity markets fluctuate.

Performance and Positioning Side by Side

Because IAUM and OUNZ track the same reference price, their performance has moved in near lockstep over recent weeks and months, with differences driven almost entirely by fees and execution. Over longer horizons, the 16-basis-point expense gap compounds in IAUM's favor, giving it a slight but persistent edge in total return. In practice, both funds rise and fall with gold's reaction to interest rate expectations, dollar movements, and safe-haven demand.

Relative positioning differs more on liquidity than on volatility. IAUM typically exhibits higher average daily volume and a tighter spread, supporting efficient entry and exit. OUNZ compensates with its delivery mechanism, which appeals to investors who value the option to convert shares into physical metal — a structural benefit rather than a performance driver. Neither fund offers the diversification of a multi-asset or sector portfolio; both are concentrated, single-commodity exposures. From what I see, this makes liquidity and fees the deciding factors for most holders.

Using AI Tools in My Research Process

I often turn to Tickeron’s AI Screener when comparing ETFs like these to quickly filter on expense ratios, liquidity metrics, and historical tracking error. It helps surface the structural differences without manual number crunching, and I’ve found it useful for confirming that lower-cost vehicles tend to pull ahead over multi-year periods in this category.

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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