If you have a Bloomberg terminal, you can pull the below screen that shows you the performance contribution of each component in an index. The below screenshot shows that of the S&P500 sorted in descending order.
Year-to-date 2024 until Friday's close, Nvidia was responsible for 42% of the S&P500 upward move, Microsoft 29% and Meta 11%. That is 82% of the index upward move. The S&P500 is up 1.47% YTD hitting its record high levels which it was at in Q4 2022, yay!
I am not implying anything. I will just shut up. I will not say anything.