An Instantaneous Market Volatility Estimation

16 Pages Posted: 12 Aug 2019 Last revised: 14 Aug 2019

Date Written: August 7, 2019


Working on different aspects of algorithmic trading we empirically discovered a new market invariant. It links together the volatility of the instrument with its traded volume, the average spread and the volume in the order book. The invariant has been tested on different markets and different asset classes. In all cases we did not find significant violation of the invariant. The formula for the invariant was used for the volatility estimation, which we called the instantaneous volatility. Quantitative comparison showed that it reproduces realised volatility better than one-day-ahead GARCH (1,1) prediction. Because of the short-term prediction nature, the instantaneous volatility could be used by algo developers, volatility traders and other market professionals.

Keywords: volatility, order book, realised volatility, market invariant

JEL Classification: G12, G14, G17

Suggested Citation

Danyliv, Oleh and Bland, Bruce, An Instantaneous Market Volatility Estimation (August 7, 2019). Available at SSRN: or

Oleh Danyliv (Contact Author)

USoft HTI Inc ( email )

12/129 P.Pancha Str
Lviv, 79000

Bruce Bland

Fidessa Group, London ( email )

One Old Jewry
London, EC2R 8DN
United Kingdom

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