Robinhood Markets, the retail brokerage that became synonymous with the meme-stock craze, is one of the newest members of the S&P 500 index. S&P Dow Jones Indices said Friday it would add the company, ...

Index providers are bending their rules. Do they have a choice? Nasdaq tweaked its rules to allow Elon Musk’s newly public SpaceX SPCX into its flagship Nasdaq-100 Index after 15 days of trading. FTSE ...