Investors are being advised on the best metals exchange-traded funds (etfs) to invest in for 2026, with various outlets recommending different options for metals such as copper, gold, silver, and nickel. The recommendations appear to be tailored to specific investor interests, including hedging against stock volatility and investing in metals for the ai data center boom. The best etfs for 2026 may depend on the individual investor's goals and the specific metal or investment strategy.