Top 20 US stock transactions: Trump Media Technology Group's stock price surged 12%; Nvidia briefly became the world's most valuable company during trading. Trump Media Technology Group closed up 12.37%, with a transaction volume of $3.76 billion. But with the development of the US election situation, stock prices gradually turned up; Nvidia closed up 0.48% with a transaction volume of $25.358 billion. Nvidia once surpassed Apple during trading to become the world's most valuable company again.