Why Did Rockley Photonics (RKLY) Stock Gain 67% Pre-Hours?

Despite the lack of any major news, Rockley Photonics Holdings Limited (NYSE: RKLY) is rising on the charts today, up 67.05% to trade at $0.2499 at the last check in premarket activity. What is driving the pre-hours increase in RKLY stock then? In order to give a more complete picture of the multinational medical technology […]