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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is a measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.

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AUCTION

A formal market exchange in which prospective buyers make bids to purchase a commodity. An auction is an effective way of exchanging commodities by bringing together buyers and sellers. Auctions are commonly used to exchange financial instruments, agricultural commodities, personal assets, and works of art. Three notable types of auctions are English, Dutch, and sealed-bid.

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Today, you are likely to spend a great deal of time at a flea market trying to buy either a 200-foot blue garden hose or a video camera with stop action features. Be on the lookout for letters from the Internal Revenue Service.
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North Carolina supplied all the domestic gold coined for currency by the U.S. Mint in Philadelphia until 1828.
"When you play, play hard; when you work, don't play at all. "

-- Theodore Roosevelt, 26th US president

AACT
American Assocation of Commodity Traders
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