New York University economist Edward Wolff conducted a careful study of stock ownership in 2013 and found that 81 percent of the stock market worth is concentrated in the top 10 percent of households by wealth.
I spoke with Wolff and he was kind enough to update the numbers. It's gotten worse: 84 percent of the stock in the United States is owned by the top 10 percent of households by net wealth.
These are incredible statistics. More than 93 percent of the stock is owned by the top 20 percent of households. The bottom 80 percent of households owns only about 7 percent of stock.
By the way, this includes direct ownership of stocks and indirect ownership through mutual funds, trusts, IRAs, Keogh plans and other retirement accounts. Everything.