Spherix (NASDAQ: SPEX ) shares declined 9.23% to touch a new 52-week low of $5.51. Spherix's trailing-twelve-month ROE is -99.69%. Plug Power (NASDAQ: PLUG ) shares touched a new 52-week low of $0.405. Plug Power's trailing-twelve-month operating margin is -105.39%. Celsion (NASDAQ: CLSN ) shares dropped 12.05% to touch