Equilibrium Effects of Intraday Order-Splitting Benchmarks
57 Pages Posted: 27 Mar 2018 Last revised: 30 Mar 2020
Date Written: May 3, 2019
This paper presents a continuous-time model of intraday trading, pricing, and liquidity with dynamic TWAP and VWAP benchmarks. The model is solved in closed-form for the competitive equilibrium and also for non-price-taking equilibria. The intraday trajectories of TWAP trading targets cause predictable intraday patterns of price pressure, and randomness in VWAP target trajectories induces additional randomness in intraday price-pressure patterns. TWAP and VWAP trading both reduce market liquidity and increase price volatility relative to just terminal trading targets alone. The model is computationally tractable, which lets us provide a number of numerical illustrations.
Keywords: Dynamic trading, TWAP, VWAP, portfolio rebalancing, liquidity, market-maker inventory, equilibria, market microstructure
JEL Classification: G12, G11, D53
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