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MARGIN REQUIREMENT: The fraction of the purchase price of financial investments, like stocks and bonds, that the buyer must pay for in cash. The remaining part of the purchase price can thus be financed with credit.

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MARKET FAILURES

Imperfections in the exchange process between buyers and sellers that prevent markets from efficiently allocating scarce resources. Market failures come in four varieties -- public goods, market control, externalities, and imperfect information. Market efficiency is achieved if the value of goods produced is equal to the value of foregone production. Markets fail when this efficiency condition is not achieved. Such failures can only be corrected by government intervention.

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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time flipping through the yellow pages trying to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for infected paper cuts.
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Lombard Street is London's equivalent of New York's Wall Street.
"If you wouldn't write it and sign it, don't say it."

-- Earl Wilson, Columnist

ADR
American Depositary Receipt, Asset Depreciation Range
A PEDestrian's Guide
Xtra Credit
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