Market microstructure
Encyclopedia
Market microstructure is a branch of finance
Finance
"Finance" is often defined simply as the management of money or “funds” management Modern finance, however, is a family of business activity that includes the origination, marketing, and management of cash and money surrogates through a variety of capital accounts, instruments, and markets created...

 concerned with the details of how exchange occurs in markets. While the theory of market microstructure applies to the exchange of real or financial assets, more evidence is available on the microstructure of financial markets due to the availability of transactions data from them. The major thrust of market microstructure research examines the ways in which the working processes of a market affects determinants of transaction cost
Transaction cost
In economics and related disciplines, a transaction cost is a cost incurred in making an economic exchange . For example, most people, when buying or selling a stock, must pay a commission to their broker; that commission is a transaction cost of doing the stock deal...

s, prices, quotes, volume, and trading behavior.

Definition

Maureen O’Hara
Maureen O'Hara (professor)
Maureen Patricia O'Hara is an American financial economist. O'Hara is the Robert W. Purcell Professor of Management, a professor of finance, and Acting Director in Graduate Studies at the Samuel Curtis Johnson Graduate School of Management at Cornell University...

 defines market microstructure as “the study of the process and outcomes of exchanging assets under a specific set of rules. While much of economics abstracts from the mechanics of trading, microstructure theory focuses on how specific trading mechanisms affect the price formation process.”

The National Bureau of Economic Research
National Bureau of Economic Research
The National Bureau of Economic Research is an American private nonprofit research organization "committed to undertaking and disseminating unbiased economic research among public policymakers, business professionals, and the academic community." The NBER is well known for providing start and end...

has a market microstructure research group that, it says, “is devoted to theoretical, empirical, and experimental research on the economics of securities markets, including the role of information in the price discovery process, the definition, measurement, control, and determinants of liquidity and transactions costs, and their implications for the efficiency, welfare, and regulation of alternative trading mechanisms and market structures.”

Issues

Microstructure deals with issues of market structure and design, price formation and price discovery, transaction and timing cost, information and disclosure, and market maker and investor behavior.

Market structure and design

This factor focuses on the relationship between price determination and trading rules. In some markets, for instance, assets are traded through dealers who keep an inventory (e.g., new cars), while other markets are dominated by brokers who act as intermediaries (e.g. housing). One of the important questions in microstructure research is how market structure affects trading costs and whether one structure is more efficient than another.

Price formation and discovery

This factor focuses on the process by which the price for an asset is determined. For example, in some markets prices are formed through an auction process (e.g. eBay), in other markets prices are negotiated (e.g., new cars) or simply posted (e.g. local supermarket) and buyers can choose to buy or not.

Transaction cost and timing cost

This factor focuses on transaction cost and timing cost and the impact of transaction cost on investment returns and execution methods. Transaction costs include order processing costs, adverse selection costs, inventory holding costs, and monopoly power.

Information and disclosure

This factor focuses on the market information and transparency and the impact of the information on the behavior of the market participants.

See Also

  • Harris, Lawrence, Trading & Exchanges, Market Microstructure for Practitioners, Oxford Press, Oxford, 2003, ISBN 0-19-514470-8.
  • Hasbrouck, Joel, Empirical Market Microstructure, Oxford Press, Oxford, 2007, ISBN 0-19-530164-1.
  • Madhavan, Ananth, 2000, "Market Microstructure: A Survey." Journal of Financial Markets 3, 205-258.
  • O'Hara, Maureen, Market Microstructure Theory, Blackwell, Oxford, 1995, ISBN 1-55786-443-8.
  • Stoll, Hans R., "Market Microstructure," in Constantinides, Harris and Stulz (eds.), Handbook of the Economics of Finance, Elsevier, Amsterdam, 2003, ISBN 0-44-451363-9.
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