Measuring the effectiveness of volatility auctions

Carlos Castro, Diego A. Agudelo and Sergio Preciado

International Review of Economics & Finance, 2020, vol. 70, issue C, 566-581

Abstract: We propose a method for event studies based on synthetic portfolios that provides a robust data-driven approach to build a credible counterfactual. The method is used to evaluate the effectiveness of volatility auctions using intraday data from the Colombian Stock Exchange. The results indicate that the synthetic portfolio method provides an accurate way to build a credible counterfactual that approximates the behavior of the asset if the auction had not taken place. The main results indicate that the volatility auction mitigates the volatility of the asset, but its effect on liquidity and trading activity is ambiguous at best.

Keywords: Circuit breaker; Trading halt; Volatility auction; Synthetic control; Event studies; Tracking portfolios (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:reveco:v:70:y:2020:i:c:p:566-581

DOI: 10.1016/j.iref.2020.06.024

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