IHI

IHI is the iShares U.S. Medical Devices ETF, an exchange-traded fund that pools investor money to buy a basket of publicly traded U.S. companies that make medical devices and equipment (things like pacemakers, surgical tools, and diagnostic machines). It doesn't manufacture anything itself — it simply tracks an index of medical-device makers, so its value rises and falls with that group of companies as a whole rather than with any single business.