• Skip to main content
  • Skip to footer

OptionMetrics

search
  • About Us
    • Who We Serve
    • Why OptionMetrics
    • Leadership
  • Data Products
    • Equities
      • United States
      • Europe
      • Asia
      • Canada
      • ETFs
    • Futures
    • Signed Volume
    • Implied Beta
    • Dividend
      • Implied Dividend
      • Dividend Forecasting
  • Research
  • Blog
  • News & Events
  • Careers
  • Contact

J. Gatheral, I. Matic, Ivan, R. Radoicic, D. Stefanica: Tighter Bounds for Implied Volatility

February 26, 2017

We establish bounds on Black-Scholes implied volatility that improve on the uniform bounds previously derived by Tehranchi. Our upper bound is uniform, while the lower bound holds for most options likely to be encountered in practical applications. We further demonstrate the practical effectiveness of our new bounds by showing how the efficiency of the bisection algorithm is improved for a snapshot of SPX options quotes.

Download

Share this post:
  • Facebook
  • Pinterest
  • Twitter
  • Linkedin
OptionMetrics Logo
  • About Us
  • Who We Serve
  • Why OptionMetrics
  • Leadership
  • Data Products
  • Equities
  • Futures
  • Signed Volume
  • Implied Beta
  • Dividend
  • Research
  • Blog
  • News & Events
  • Careers
  • Contact Us
  • Support Request
Stay Connected

dashicons-linkedin dashicons-twitter dashicons-facebook-alt

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply

© 2025 OptionMetrics, LLC. All Rights Reserved. | Privacy Policy | Terms of Use | Accessibility | Site Map