Nvidia stock rose early Friday as investors digested a raft of mixed news over the past few days. Shares were up 0.2% to $147.54 in early trading. It closed almost flat Thursday after starting the day in the red as a fresh outlook from supplier SK Hynix cast doubt over future demand for its products.

Shares of Nvidia (NASDAQ: NVDA) and Vistra (NYSE: VST) have surged 860% and 700%, respectively, since the beginning of 2023. Both companies have benefited from the artificial intelligence (AI) boom despite operating in very different parts of the economy. Tepper sold 65,000 shares of Nvidia, reducing his position by 9%.