The Journal of Finance publishes leading research across all the major fields of finance. It is one of the most widely cited journals in academic finance, and in all of economics. Each of the six issues per year reaches over 8,000 academics, finance professionals, libraries, and government and financial institutions around the world. The journal is the official publication of The American Finance Association, the premier academic organization devoted to the study and promotion of knowledge about financial economics.
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Would Order‐By‐Order Auctions Be Competitive?
Published: 05/13/2025 | DOI: 10.1111/jofi.13449
THOMAS ERNST, CHESTER SPATT, JIAN SUN
We model two methods of executing segregated retail orders: brokers' routing, whereby brokers allocate orders using the market maker's overall performance, and order‐by‐order auctions, where market makers bid on individual orders, a recent U.S. Securities and Exchange Commission proposal. Order‐by‐order auctions improve allocative efficiency, but face a winner's curse reducing retail investor welfare, particularly when liquidity is limited. Additional market participants competing for retail orders fail to improve total efficiency and investor welfare when entrants possess information superior to incumbent wholesalers. Our results hold when new entrants are less informed or the information structure differs. We also examine the cross‐subsidization of brokers' routing.