Episode Summary

While we often hear that "the market" is up, the mechanics of how stock indexes are constructed can paint a highly distorted picture of daily trading. This episode breaks down the design of capitalization-weighted indexes, which use float-adjusted market capitalization to weight companies based on their market size rather than their business quality. Under this structure, a small handful of massive corporations can dominate the index's performance, allowing the overall market to rise even while the vast majority of individual constituent stocks are declining.

We also untangle the significant compounding gap between a price return index—the dividend-excluding number routinely quoted in media headlines—and a total return index, which includes reinvested dividends. Over l ...