Forget Invesco's S&P 500 ETF and Buy This Instead

Over the past several years, even casual investors have likely heard the term "concentration risk." One of its interpretations refers to a small number of stocks commanding outsize percentages in supposedly diverse broad-market indexes. Indeed, that is the state of the S&P 500 today. As of Feb. 9, just five stocks accounted for approximately 27% of that index. Historically speaking, that's a higher percentage and reflects what can happen when indexes and funds weight components by market capitalization. Und ...