put call ratio - SERP Analysis

https://en.macromicro.me/charts/449/us-cboe-options-put-call-ratio

https://www.investopedia.com/ask/answers/06/putcallratio.asp

https://www.barchart.com/stocks/quotes/%24SPX/put-call-ratios

https://ycharts.com/indicators/cboe_equity_put_call_ratio

https://www.sofi.com/learn/content/put-call-ratio/

https://en.wikipedia.org/wiki/Put/call_ratio

https://www.optionistics.com/put-call-ratio/

https://www.hkex.com.hk/eng/sorc/market_data/statistics_putcall_ratio.aspx

https://www.bajajfinserv.in/put-call-ratio

https://ltu.edu/wp-content/uploads/2024/11/RD2018_Huang_MBA_GRA.pdf