StocksWhat You Need to Know About IndexesSavePrintA trader reacts on the floor of the New York Stock Exchange at the closing bell in New York on Dec. 30, 2022. Timothy A. Clary/AFP via Getty ImagesTribune News Service5/15/2023|Updated: 5/15/20230:00X 1By Kim Clark From Kiplinger’s Personal FinanceToday, there are an estimated 3 million indexes that provide benchmarks against which to measure investment performance and serve as recipes for the portfolios of a vast number of indexed mutual and exchange-traded funds.We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.Share this articleLeave a commentTribune News ServiceAuthorAuthor’s Selected ArticlesThis 3-Course Vegan Meal Is Great for Vegetarian Awareness MonthOct 23, 20257 Guilt-Free Ways to Spend Your Retirement CashOct 23, 2025Teriyaki Glazed Pork With Chinese NoodlesOct 22, 202510 Tips From Actual Kids on Reconnecting With Your Childlike Sense of WonderOct 21, 2025Related TopicsDow JonesstocksbondsS&P 500indexrussell