Mario Tama / Getty Images Warner Bros. Discovery shares fell as the stock was downgraded by TD Cowan, citing concerns the stock could tumble if a takeover by Paramount Skydance isn't carried out. Key Takeaways The S&P 500 and Nasdaq slipped from their record highs Tuesday as the Federal Reserve's two-day meeting kicked off. Warner Bros. Discovery shares fell as the stock was downgraded by TD Cowan, citing concerns the stock could tumble if a takeover by Paramount Skydance isn't carried out. Shares of ...