AUMI vs SILJ: Gold Miners ETF Compared to Junior Silver Miners

Key Takeaways

• AUMI tracks the Solactive Global Pure Gold Miners Index, holding roughly 25–30 large gold-mining companies, while SILJ tracks the Nasdaq Junior Silver Miners Index with about 68 small-cap silver miners.
• The funds target different precious metals: AUMI is pure gold-mining exposure, whereas SILJ leans on silver producers with heavier industrial-demand sensitivity.
• AUMI is cheaper at a 0.35% net expense ratio versus 0.69% for SILJ, though SILJ offers far greater scale and liquidity.
• SILJ holds a substantial asset base of roughly $3.5 billion, while AUMI is a much smaller, newer fund with assets in the tens of millions of dollars.
• Risk profiles differ meaningfully: SILJ's junior, small-cap miners carry higher volatility and beta than AUMI's larger-cap gold producers.
• Tickeron AI Verdict: SILJ — favored for its deeper diversification, superior liquidity, established track record, and stronger relative trend momentum.

Why These Two Precious-Metals ETFs Stand Out

Precious-metals equities have drawn renewed attention as investors consider inflation hedging, central-bank buying, and dollar weakness amid shifting rate expectations. The Themes Gold Miners ETF (AUMI) and the Amplify Junior Silver Miners ETF (SILJ) both provide equity exposure to the mining sector, yet they are not interchangeable. AUMI focuses on larger-cap gold producers, while SILJ targets small-cap silver miners that often include exploration-stage names. Comparing them helps clarify how different metals, company sizes, and fund designs influence risk, return potential, and positioning.

Themes Gold Miners ETF (AUMI) Overview

AUMI is a passively managed fund designed to track the Solactive Global Pure Gold Miners Index, which selects the largest companies by market capitalization that generate most of their revenue from gold mining. The portfolio stays concentrated, typically holding 25–30 names. Recent top holdings have included IAMGOLD Corp (about 5.5%), Zhaojin Mining Industry, Equinox Gold Corp, Northern Star Resources, AngloGold Ashanti, Kinross Gold Corp, and B2Gold Corp.

The index keeps sector exposure essentially 100% in precious-metals mining, with geographic spread across North America, Australia, and emerging markets. AUMI carries a competitive net expense ratio of 0.35% and relatively low turnover. Launched in late 2023, the fund remains smaller and younger, which means lower trading volume and a narrower liquidity profile than more established peers.

Amplify Junior Silver Miners ETF (SILJ) Overview

SILJ is a passively managed fund that seeks to match, before fees and expenses, the total return of the Nasdaq Junior Silver Miners Index. It is the only U.S.-listed ETF focused on small-cap silver miners and holds roughly 68 securities, spanning producers, explorers, and royalty or streaming companies. Recent top holdings have included Hecla Mining (around 11%), Coeur Mining (around 10.8%), First Majestic Silver (around 10.6%), Wheaton Precious Metals (around 5.6%), and SSR Mining (around 4.8%).

The index applies a thematic market-capitalization weighting and rebalances quarterly. SILJ’s expense ratio stands at 0.69%, reflecting the specialized and less-liquid nature of its holdings. With net assets above $3 billion and more than a decade of history since its 2012 launch, SILJ delivers deeper liquidity and broader diversification than AUMI, though its small-cap emphasis heightens both upside and downside volatility.

Industry Context and Key Drivers

Both funds operate within the precious-metals equity space, which responds to real interest rates, the U.S. dollar, and physical metal prices. Gold has gained from ongoing central-bank purchases and its safe-haven status, supporting the larger producers that anchor AUMI. Silver serves dual roles as a monetary metal and an industrial input in solar panels, electronics, and electric vehicles, giving SILJ added exposure to manufacturing and clean-energy cycles while also linking it more closely to global growth trends.

Higher gold and silver prices have expanded miner margins in recent periods, yet rising financing costs and permitting hurdles continue to challenge junior explorers. Silver’s smaller market and concentrated junior universe make SILJ more sensitive to these shifts than AUMI’s established producers.

Performance Patterns and Structural Differences

Over recent weeks and months, both funds have gained from firmer precious-metals prices, but their return and volatility profiles have diverged. SILJ’s junior silver miners have shown sharper moves in both directions than AUMI’s larger gold producers, reflecting silver’s industrial beta and the operating leverage typical of smaller companies. AUMI has provided steadier positioning tied to gold’s defensive qualities.

Structurally, SILJ’s 68 holdings deliver wider diversification than AUMI’s concentrated 25–30-name portfolio, yet the small-cap tilt brings higher single-stock and liquidity risk. AUMI’s lower 0.35% fee offers a clear cost edge, but its modest scale and thinner trading volume can lead to wider premiums or discounts to NAV. For investors focused on liquidity and consistent trend behavior, SILJ’s size and momentum have stood out more strongly in recent cycles. I also checked this using Tickeron’s AI Screener to see how the two compare on technical and momentum metrics.

Tickeron AI Verdict

Based on observable structural factors, Tickeron’s AI currently favors SILJ over AUMI. The assessment centers on SILJ’s substantially larger asset base and liquidity, its deeper 68-holding diversification, a much longer operating history, and stronger relative trend momentum in the silver-mining space. While AUMI holds a genuine cost advantage at 0.35% versus 0.69%, its smaller scale, concentrated portfolio, and thinner trading volume weigh against it in the relative evaluation. This view remains probabilistic and rests on measurable fund characteristics rather than any guarantee of future returns.

Using AI Tools in My Research Process

When comparing ETFs like these, I often rely on Tickeron’s AI Screener to quickly filter technical patterns, fundamentals, and trend signals across the sector. It helps surface relevant data points and compare holdings more efficiently than manual review alone, which is especially useful when evaluating liquidity, volatility, and momentum differences between funds.

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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