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What's S&P that has just increased dramatically?

S&P 500 is a stock market index tracking the performance of 500 large U.S. companies, representing about 80% of total U.S. equity market value.Before now ,it used to be 4k,5k,6k....This is the first time it is hitting 7000 plus..That all I know about it for now.Thank you.

Wow oooo, I appreciate this explanations, I now understand. That's to say

"America first"

quote is becoming a reality, thank God for them!

Yes ooo, It serves as a benchmark for U.S. economic health and investor sentiment; when people say the market is up, they often mean the S&P 500.