It's not editorialized. "Those 5 stocks are up 37% on average while the S&P 500 is up 2%, and the remaining 495 stocks are down 5%."
5/500 = 1%.
The title is different from the title on the article, so it is editorialized.
It can be mine mistake, is it not allowed?
Generally not. The guidelines say you should submit the actual title, unless the title is clickbait, uninformative, otherwise misleading, or longer than the character limit.
Thanks. Should not have added my text.
It's market cap weighted, so they make up more than 1% of the index. Just based on the numbers shown (+2%, -5%, and +37%) they must represent about 17% of the S&P 500.
So those 500 stocks are now the "economy?" Its a very misleading title.