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LEVERAGE: The use of credit or loans to enhance speculation in the financial markets. Suppose, for example, that you take the $1,000 in your bank account to your stock broker and purchase $1,000 worth of stocks, bonds, or whatever. A leveraged purchase would let you use your $1,000 to buy, let's say, $10,000 worth of stocks or bonds. The remaining $9,000 of the purchase price comes from a loan.

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.

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Today, you are likely to spend a great deal of time searching for a specialty store looking to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for deranged pelicans.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
"I have no expectation of making a hit every time I come to bat. What I seek is the highest possible batting average."

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