Futures, Miners or Physical Trusts: Choosing the Right Metal ETF Structure in Volatile Markets

COPX, the Global X Copper Miners ETF, returned 93 per cent in 2025. CPER, the United States Copper Index Fund tracking copper futures, returned 38 per cent. Copper itself rose approximately 41 per cent for the year. GDX, the VanEck Gold Miners ETF, returned 153 per cent while gold rose 65 per cent. Different investment vehicles, all ostensibly tracking the same metal, produced substantially different outcomes.

For Indian investors allocating capital to metals through U.S. markets, choosing the wrong structure would have cost you 55 to 110 percentage points of performance in 2025, depending on the metal. The stakes are even higher in 2026. Copper hit an all-time high of approximately USD 14,500/tonne on LME in January 2026 before falling back to around USD 11,750 by late March.

Gold surged past USD 5,500 per ounce, set multiple records, then fell sharply when a hawkish Fed hold collided with an escalating U.S.-Iran conflict. It trades around USD 4,400 today. Silver's move was the most dramatic: a nominal all-time high of USD 121.67 per ounce on January 29, followed by a 47 per cent crash in under a week. Trump's tariffs, geopolitical shocks, and volatile monetary signals have created swings that annual return tables cannot capture. This environment makes the choice of ETF structure critical.

The Three Structures: How They Work Across Metals

Metal ETFs come in three distinct architectures, each delivering vastly different exposure to the same underlying commodity.

Physical Trusts

Physical trusts hold actual metal in vaults. GLD stores gold bars in London with approximately USD 155 billion in assets and a 0.40 expense ratio. IAU offers identical gold exposure at 0.25 per cent. Both show minimal tracking error. GLD, for example, underperforms spot gold by approximately 0.30 per cent annually, almost entirely explained by fees. SLV holds approximately 490 million ounces of silver bullion with a 0.50 per cent expense ratio. The creation-redemption mechanism keeps premiums and discounts negligible as arbitrage functions seamlessly in these deep markets.

Copper breaks this model. Sprott Physical Copper Trust launched in June 2024, trades on the Toronto Stock Exchange and over the counter in the U.S. as SPHCF, and has filed for a NYSE Arca listing. As of March 2026, it trades at a premium of approximately 20-29 per cent to net asset value, depending on the share class, meaning an investor pays between USD 1.20 and USD 1.29 for every dollar of copper held. The premium has compressed from higher levels earlier in the year as copper prices corrected. The fundamental challenge is copper's low value-to-weight ratio: at current prices, a tonne of gold is worth approximately USD 141 million versus copper's roughly USD 11,750 per tonne, requiring vastly more warehouse capacity per dollar invested.

Futures-Based ETFs

Futures-based ETFs track contracts, and not physical metal commodities. CPER holds copper futures on COMEX, tracking the SummerHaven Copper Index Total Return, rolling contracts monthly. When futures exceed spot (contango), each roll costs money. Since 2011, spot copper rose 64.87 per cent while CPER gained 43.84 per cent. The 21-point shortfall translates to 1.3-1.5 per cent drain annually. Based on market conditions, steep contango during oversupply periods increases drag, while backwardation during shortages can temporarily boost returns.

CPER employs active mitigation by concentrating in front contracts during backwardation and spreading across three contracts during contango. The fund also earns T-bill collateral yield (currently around 3.6-3.7 per cent following three Fed rate cuts in late 2025), which partially offsets roll costs. CPER carries an expense ratio of approximately 1 per cent. That sits above both physical trusts and mining ETFs, which means investors pay the management fee on top of, not instead of, the roll drag. The two costs compound.

Yet, the structural cost persists, milder than energy commodities (crude oil futures lost approximately 14.6 per cent annualized over a decade). Gold and silver futures see minimal adoption because physical ETFs work efficiently. Futures suit tactical trades (3-6 months) where roll costs don't compound meaningfully. For multi-year metal exposure, the cumulative drag makes futures feel similar to a rental agreement when investors need ownership.

Mining Company ETFs

Mining ETFs invest in companies that extract metals, creating operational leverage through fixed costs. When metal prices rise, mining profits expand disproportionately. 2025’s bull market demonstrated this dramatically, but with crucial differences across metals.

Gold miners (GDX) returned 153 per cent in 2025 versus gold's 65 per cent rise, a leverage of around 2.35x. Copper miners (COPX) returned 93 per cent against copper's 41 per cent rise (2.3x leverage)

In the case of silver miners, SIL gained approximately 166 per cent as silver jumped 144 per cent, delivering roughly 1.15x leverage. This is because around 70 per cent of global silver production comes from byproduct mining, where companies primarily extract copper, zinc, or gold and produce silver as a secondary output. This byproduct structure dilutes pure silver price sensitivity for silver mining ETFs.

Mining ETFs introduce company-specific operational risks. The Grasberg copper mine disaster in September 2025, when 8,00,000 tonnes of wet material flooded Freeport-McMoRan's block cave, illustrates the asymmetry precisely. Freeport-McMoRan declared force majeure, with the block cave section shut down indefinitely. Copper prices didn't hold steady, they rallied, as the shutdown of one of the world's largest copper operations tightened the global supply picture and contributed to copper's surge toward record highs by December. COPX holders absorbed Freeport's company-specific shock simultaneously. That is the mining ETF trade in one event: commodity exposure with an equity risk layer on top.

Mining ETFs also carry equity-correlated market risk alongside commodity exposure. During broad selloffs, GDX can decline even when gold rises. This dual exposure creates the highest risk profile among metal ETF structures. Expense ratios run around 0.51-0.65 per cent, sitting between physical trusts and futures.

Decision Framework: Matching Structure to Metal and Objective

The right structure depends on your time horizon, risk tolerance, and your level of conviction on metal price direction. The recommendations below assume a bull market view. In bear markets or sideways trading, physical trusts typically preserve capital better than miners while futures can benefit from backwardation.

For gold exposure: Conservative long-term investors should consider GLD (pure tracking, 0.40 per cent expense ratio, low volatility). Those with strong bull conviction, 5+ year horizons, and high risk tolerance might consider GDX despite potential 45 per cent + drawdowns.

For silver exposure: SLV (0.50 per cent expense ratio) provides direct tracking, though silver's volatility deserves more than a footnote. January 2026 alone saw silver hit a nominal all-time high of USD 121.67 before crashing 47 per cent in under a week. SLV tracked every dollar of that move in both directions. SIL's 1.15x leverage in 2025 reflects the structural ceiling byproduct dilution imposes, though silver miners do amplify directional moves, including sharply to the downside as January 2026 confirmed.

For copper exposure: Long-term conviction on electrification and AI infrastructure supports COPX (2.3x leverage with operational risks). Tactical 6-12 month trades suit CPER despite 1-2 per cent annual contango costs. Sprott's still-elevated NAV premium of approximately 20-29 per cent makes exposure to copper via physical trusts impractical in our view.

Disclaimer: The opinions expressed above are of the author and may not reflect the views of DSIJ.