Robinhood Markets (Nasdaq: HOOD), the e-trading platform that offers stocks and cryptocurrencies, recently got added to the S&P 500 index. On Sep. 9, the exchange made a major announcement for users who depend a lot on social media for exchanging trading ideas. Related: What is Crypto? Cryptocurrency explained Robinhood Social The platform said it will launch a social media feature called Robinhood Social within its app, where users can share their gains, losses, strategies and make real-time market mov ...