![Cboe on Twitter: "S&P 500 options ($SPX & $SPXW) avg. daily volume grew to 1.55 million in Jan. – strong start for 2018 https://t.co/x7t0ia3sh1 https://t.co/4DR1X1y13P" / Twitter Cboe on Twitter: "S&P 500 options ($SPX & $SPXW) avg. daily volume grew to 1.55 million in Jan. – strong start for 2018 https://t.co/x7t0ia3sh1 https://t.co/4DR1X1y13P" / Twitter](https://pbs.twimg.com/media/DVDu0EzVwAA1OI3.jpg)
Cboe on Twitter: "S&P 500 options ($SPX & $SPXW) avg. daily volume grew to 1.55 million in Jan. – strong start for 2018 https://t.co/x7t0ia3sh1 https://t.co/4DR1X1y13P" / Twitter
![New All-Time Record - Open Interest For Cboe S&P 500 Options Surpasses 21 Million Contracts | Seeking Alpha New All-Time Record - Open Interest For Cboe S&P 500 Options Surpasses 21 Million Contracts | Seeking Alpha](https://static.seekingalpha.com/uploads/2018/12/28/saupload_SB1-SP-500-open-interest-thru-Dec-20.png)
New All-Time Record - Open Interest For Cboe S&P 500 Options Surpasses 21 Million Contracts | Seeking Alpha
![Implied Volatility skew of the S&P 500 Index call options. This figure... | Download Scientific Diagram Implied Volatility skew of the S&P 500 Index call options. This figure... | Download Scientific Diagram](https://www.researchgate.net/profile/Mo-Chaudhury/publication/228291153/figure/fig4/AS:941114240536577@1601390528126/Implied-Volatility-skew-of-the-S-P-500-Index-call-options-This-figure-plots-the-daily_Q320.jpg)