Samsung SDI is trading at KRW 508,000, up 5.07%, amid a Korean battery-stock rally that Korea JoongAng Daily linked to expectations of a Democratic U.S. midterm sweep and possible renewed clean-energy incentives. - Samsung SDI gained 5.07%, compared with a 3.09% rise in the KOSPI. - The company announced a 1 GWh U.S. energy-storage supply deal with Alpha Omega Power; reporting did not establish it as the direct cause of the share move.