最新报道:Billionaire investor Ken Griffin's hedge fund Citadel has acquired a 5.2% stake in NioCorp Developments (NB), purchasing 3.8 million shares of the critical minerals developer. NioCorp's Nebraska project focuses on producing rare earth minerals like niobium and scandium, with its stock surging 124% this year to $3.16. The investment represents 5.4% of Citadel's portfolio, aligning with its recent energy sector focus, including involvement in Chevron's $53 billion Hess acquisition through merger arbitrage strategies.