(Bloomberg) The frenzied adoration of South Korean retail traders for everything EV battery-related has sparked a meteoric rally of one cathode producer, making it the world’s best-performing stock this year. Most Read from BloombergVilified Zero-Day Options Blamed by Traders for S&P DeclineS&P Logs Worst Day in Two Months, Bonds Power On: Markets WrapThe Hedge Fund Traders Dominating a Massive Bet on BondsTrump Barred From Colorado Ballot in Unprecedented RulingCitigroup Is Exiting Distresse