![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
![Nearly half the options on S&P 500 stocks as well as on SPY and QQQ have maturities of less than 24 hours. Nearly half the options on S&P 500 stocks as well as on SPY and QQQ have maturities of less than 24 hours.](https://blog.syzgroup.com/hubfs/options%20aturities.png)
Nearly half the options on S&P 500 stocks as well as on SPY and QQQ have maturities of less than 24 hours.
![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)