market index - SERP Analysis

https://www.marketindex.com.au/

https://www.cnbc.com/markets/

https://www.investing.com/indices/major-indices

https://en.wikipedia.org/wiki/Stock_market_index

https://finance.yahoo.com/markets/world-indices/

https://www.investor.gov/introduction-investing/investing-basics/glossary/market-indices

https://www.google.com/finance/markets/indexes%3Fhl%3Den

https://tradingeconomics.com/united-states/stock-market

https://www.cnn.com/markets

https://www.investopedia.com/terms/m/marketindex.asp