Materials ETFs: Broad funds and critical minerals
AI data-center buildouts, inflation and supply constraints are driving inflows into materials ETFs, lifting demand for broad funds such as XLB and critical-minerals ETFs focused on copper and lithium.
Flows into materials exchange-traded funds have risen this year. State Street Global Advisors’ flash flows show the materials sector recorded the fourth-largest sector inflows year-to-date. Market participants cite AI data-center construction, power-grid expansion, supply-chain reshaping and higher extraction costs as factors increasing demand for basic materials.
Large data centers and upgraded power infrastructure require substantial amounts of concrete, structural steel and copper, creating steady industrial demand. At the same time, supply constraints and geopolitical friction, including volatility in the Middle East, have put upward pressure on input prices. Higher extraction costs have given producers room to pass expenses down the supply chain, supporting revenue for mining and processing companies.
“Inflation does not start at the checkout counter,” Jennifer Nash, an economic and market research analyst at TMX VettaFi, noted. “When rising extraction costs and supply constraints drive up producer prices, those wholesale increases inevitably push through the supply chain into consumer prices. Basic materials absorb those cost pressures early in the chain.”
Several broad, liquid ETFs provide core exposure to U.S. materials stocks. The State Street Materials Select Sector SPDR ETF (XLB) holds more than $8 billion and charges a 0.08% expense ratio. The Vanguard Materials ETF (VAW) covers large-, mid- and small-cap U.S. materials names, has about 111 holdings and charges 0.09%. The iShares U.S. Basic Materials ETF (IYM) carries a 0.38% fee and leans more toward metals, mining and natural resources. The Fidelity MSCI Materials Index ETF (FMAT) tracks the MSCI USA IMI Materials Index with a 0.08% fee. The iShares Global Materials ETF (MXI) offers multinational exposure across developed and emerging markets.
Specialized ETFs target specific inputs. The Sprott Critical Materials ETF (SETM) focuses on companies tied to battery and critical metals such as copper, lithium, nickel, cobalt and rare earths. The Global X Copper Miners ETF (COPX) targets copper miners connected to electrification and grid work. The VanEck Gold Miners ETF (GDX) provides exposure to gold-mining equities. The iShares Global Timber & Forestry ETF (WOOD) and the VanEck Steel ETF (SLX) offer direct exposure to timber and steel supply chains, respectively. A State Street premium-income materials fund applies option-overlay strategies on large materials names, and the First Trust Materials AlphaDEX Fund (FXZ) uses a quantitative reweighting approach based on fundamental metrics.
Fund flows and the mix of available ETFs show allocations to both broad-market materials funds and narrower critical-minerals funds. Materials ETFs provide equity exposure to companies that extract and process raw inputs and offer an alternative to holding physical commodities directly.








