iShares U.S. Basic Materials ETF (IYM US) – Investment PropositioniShares U.S. Basic Materials ETF (IYM) provides focused exposure to U.S. companies involved in chemicals, metals and mining, packaging, and forest products, offering a direct way to express a view on upstream industrial inputs. The strategy tracks a broad, market-cap-weighted basket of basic-materials equities, emphasizing liquidity and sector breadth while accepting the inherent concentration and cyclicality of the opportunity set. Returns a ...