Cryptocurrency exchange FTX is adding trading in stocks and ETFs to its popular crypto trading app, the company said on Thursday, putting it directly in competition with stock-trading apps like Robinhood (NASDAQ:HOOD). HOOD shares are slipping 0.7% in premarket trading. The new service will be open to a limited number of U.S. users on Thursday then expanded to all American users in the next few months. The app may eventually offer trading in other asset classes, such as futures, using the same interface, FTX US President Brett Harrison told the Wall Street Journal. The move into stock trading puts FTX, the crypto-native firm founded by Sam Bankman-Fried, directly in competition with Robinhood Markets (HOOD), which had started as a stock-trading app and later added crypto trading. Earlier this month, Bankman-Fried's Emergent Fidelity Technologies vehicle bought a 7.6% stake in Robinhood (HOOD). The frim said it bought the stock because it's an attractive