Juan M. Morelli Inventory market participation within the U.S. has modified dramatically over the previous 4 many years. Within the mid-Nineteen Eighties, fewer than 30 p.c of households held fairness. By the early 2000s, greater than half of U.S. households owned fairness, both immediately or by mutual funds, 401(okay)s, and IRAs. As participation widened, the …