Breaking news

2026-03-24

AI Summary

This study addresses how dynamic circuit breakers in high-frequency markets disrupt price discovery following macroeconomic news announcements, rendering conventional nonparametric jump estimators inconsistent. The authors develop a high-frequency signal-noise model to elucidate the regulatory trade-off between circuit breaker rules and efficient price discovery. They propose a novel regression-based test that identifies mispricing by comparing transient price movements during trading halts with the latent jumps implied by observable fundamentals. This approach accommodates non-vanishing transition durations and overcomes the inconsistency of traditional estimators. Empirical analysis using CME E-mini S&P 500 futures data reveals pervasive price overshooting after major news releases, indicating that current circuit breaker mechanisms impede the immediate incorporation of information into prices, thereby inducing pricing distortions and perverse incentives.

Technology Category

• Game Theory and Economic Paradigms: Imperfect Information
• Machine Learning: Probabilistic Circuits and Graphical Models
• Reasoning under Uncertainty: Causality

Application Category

• Economics, Online Markets and Human Computation: Incentives in network design for Web infrastructures and ecosystems
• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs
• Security and Privacy: Large-scale security measurements

Abstract

This paper examines how regulatory interventions in high-frequency financial markets affect price discovery. We focus on Breaking news, where dynamic circuit breakers trigger trading halts immediately after the release of macroeconomic fundamentals. Within a high-frequency signal-in-noise model, we show that triggering rules complicate statistical inference for the price impact of news, rendering conventional non-parametric jump estimators inconsistent. Building on this insight, we develop a regression-based test for fundamental pricing that accounts for non-vanishing transition times. The test compares transition price changes to efficient jumps implied by observable factors. Our empirical analysis of CME E-mini S\&P 500 futures shows that Breaking news are associated with systematic deviations from fundamental pricing, predominantly in the form of overshooting. Our findings highlight a regulatory trade-off: the appeal of simple and transparent circuit breaker rules must be weighed against their cost of preventing fundamentals from being priced contemporaneously, thereby creating adverse incentives and introducing distortions.

Problem

• price discovery
• circuit breakers
• high-frequency trading
• market regulation
• fundamental pricing

Innovation

• circuit breakers
• price discovery
• high-frequency data
• jump estimation
• regulatory intervention