Retail investors recorded their highest net buying levels in Nvidia stock during the first 80 minutes of Thursday's trading session since at least 2012. This surge reflects strong retail confidence in the AI chipmaker amid its recent performance and market momentum. The buying pressure pushed Nvidia's shares higher, reinforcing its position as a key driver in the US tech sector. The move highlights growing retail participation in high-growth tech stocks, which could amplify volatility in the broader US equity market.