Stocks under pressure as investors prepare for the SpaceX IPO, which is shaping up to be an historic liquidity event. The names that could see the most selling, plus a former derivatives trader on how to hedge any current SpaceX exposure. The CFTC’s proposed new rules for prediction markets could mean major changes for sports betting. And speaking of sports, CNBC’s Alex Sherman breaks down the big numbers behind the Knicks ahead of Game Four.