Webull shares jumped as traders piled into call options. A recent rule change could mean more revenue for the retail broker.

Webull has some solid fundamentals even as its stock has slumped by over 92% from its highest point in April last year. The most recent results showed that its revenue jumped by 36% to $159.9 million.

Although Robinhood Markets (NASDAQ:HOOD | HOOD Price Prediction) and Charles Schwab (NYSE:SCHW) are established names among self-directed brokers, there’s another contender you shouldn’t overlook.