Suppose Hewlett-Packard (HPQ) stock is currently trading on the NYSE with a bid price of $28.00 and

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Suppose Hewlett-Packard (HPQ) stock is currently trading on the NYSE with a bid price of $28.00 and an ask price of $28.10. At the same time, a NASDAQ dealer posts a bid price for HPQ of $27.85 and an ask price of $27.95.
a. Is there an arbitrage opportunity in this case? If so, how would you exploit it?
b. Suppose the NASDAQ dealer revises his quotes to a bid price of $27.95 and an ask price of $28.05. Is there an arbitrage opportunity now? If so, how would you exploit it?
c. What must be true of the highest bid price and the lowest ask price for no arbitrage opportunity to exist?

Dealer
A dealer in the securities market is an individual or firm who stands ready and willing to buy a security for its own account (at its bid price) or sell from its own account (at its ask price). A dealer seeks to profit from the spread between the...
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Corporate Finance

ISBN: 978-0133097894

3rd edition

Authors: Jonathan Berk and Peter DeMarzo

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