Key TakeawaysRobinhood Markets is allowing customers to trade on the outcome of the U.S. presidential election.The company's event contract allows investors who are U.S. citizens to choose either Vice President Kamala Harris or former President Donald Trump.Robinhood joined Interactive Brokers Group and Kalshi in offering presidential election event contracts. Robinhood Markets (HOOD) shares advanced Monday after the online trading platform announced that its customers could now make trades on the outcome o ...