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Siphoned apart: A portfolio perspective on order flow segmentation

Author

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  • Baldauf, Markus
  • Mollner, Joshua
  • Yueshen, Bart Zhou

Abstract

We study liquidity supply in fragmented markets. Market makers intermediate heterogeneous order flows, trading off spread revenue against inventory costs. Applying our model to payment for order flow (PFOF), we demonstrate that portfolio-based considerations of inventory management incentivize market makers to segment retail orders by siphoning them off-exchange. Banning order flow segmentation reduces total welfare, can make trading more costly for all investors, and can resolve a prisoner's dilemma among market makers. These results differentiate our inventory-based model from the existing information-based theories of PFOF.

Suggested Citation

  • Baldauf, Markus & Mollner, Joshua & Yueshen, Bart Zhou, 2024. "Siphoned apart: A portfolio perspective on order flow segmentation," Journal of Financial Economics, Elsevier, vol. 154(C).
    • Handle: RePEc:eee:jfinec:v:154:y:2024:i:c:s0304405x24000308
    DOI: 10.1016/j.jfineco.2024.103807
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    More about this item

    Keywords

    Order flow segmentation; Payment for order flow; Inventory management; Market making; Retail trading;
    All these keywords.

    JEL classification:

    • D47 - Microeconomics - - Market Structure, Pricing, and Design - - - Market Design
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage

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