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Area of Science:

  • Quantitative Finance
  • Market Microstructure
  • Financial Econometrics

Background:

  • Financial markets exhibit complex dynamics influenced by order flow.
  • Liquidity, a key market property, is crucial for price stability.
  • Understanding the interplay between order book dynamics and price fluctuations is essential.

Purpose of the Study:

  • To empirically analyze the microstructure of financial markets, focusing on liquidity.
  • To investigate the relationship between order book properties and price movements.
  • To develop a quantitative measure of effective liquidity.

Main Methods:

  • Empirical analysis of financial market data.
  • Examination of static and dynamic properties of market liquidity.
  • Introduction and application of a liquidity imbalance measure.

Main Results:

  • Large price fluctuations correlate with the failure of order flow compensation mechanisms on larger time scales (15 min).
  • On smaller time scales (30 s), limit order book depletion indicates system fragility and nonlinear responses.
  • A novel liquidity imbalance measure predicts the sign and magnitude of subsequent price movements.

Conclusions:

  • Market dynamics are significantly influenced by the revelation and depletion of the latent order book.
  • Effective liquidity is scale-dependent, varying with the time scales considered.
  • The findings offer a quantitative framework for understanding and measuring market liquidity.