U.S. stock futures were slightly higher this morning, with the S&P 500 futures gaining around 0.1% on Monday.Shares of Liquidia Corporation LQDA fell sharply in today's pre-market trading.The company announced that the FDA granted tentative approval of YUTREPIA inhalation powder to treat adults with pulmonary arterial hypertension and pulmonary hypertension associated with interstitial lung disease.Liquidia shares dipped 36.3% to $8.98 in pre-market trading.Here are some big stocks recording losses in today ...