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Entry, Exit, Market Makers, and the Bid-Ask Spread

Entry, Exit, Market Makers, and the Bid-Ask Spread. Sunil Wahal. Background. The main objective is to understand the relation between competition of dealer market and entry (exit) of market makers Source of competition Instinet, other exchanges, SOES, institutions

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Entry, Exit, Market Makers, and the Bid-Ask Spread

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  1. Entry, Exit, Market Makers, and the Bid-Ask Spread Sunil Wahal

  2. Background • The main objective is to understand the relation between competition of dealer market and entry (exit) of market makers • Source of competition • Instinet, other exchanges, SOES, institutions • End-of-day quoted spread as a measure of competition • Pro and con • Determinants of entry and exit of market markers for stocks on NNM • trading volume, number of trade, volatility, quoted spread, price, market cap

  3. Sample • 5569 NNM stocks between 1982 and 1993 • Calculate daily trading volume, number of trades volatility, spread for each stocks using data period in which number of market makers remain unchanged • Sample sorted into quintile

  4. Conclusion • Probability of entry and exit is affected by trading intensity, volatility, and quoted spread • Entry (exit) is associated with spread decline (increase) after controlling for trading intensity and volatility • Larger scale of entry (exit) is associated with larger decline (increase) • Spread changes are larger in magnitude for issues with few market makers • The results are consistent with the competitive model of dealer pricing

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