US stock futures saw a slight upward trend on Monday morning, with the S&P 500 futures gaining 0.1%. However, shares of Liquidia Corporation (LQDA) plummeted in pre-market trading after the company announced the FDA’s tentative approval of YUTREPIA inhalation powder for treating pulmonary hypertension. Several other stocks also experienced losses in pre-market trading, including YXT.COM GROUP HOLDING LIMITED (YXT), Mereo BioPharma Group plc (MREO), BW LPG Limited (BWLP), Shake Shack Inc. (SHAK), Serve Robotics Inc. (SERV), Himalaya Shipping Ltd. (HSHP), and Applied Digital Corp (APLD).