In business, a callover is a meeting of commodity brokers and dealers at fixed times during the day in order to form a market in that commodity. The callover is usually used for trading in futures, in fixed quantities on a standard contract, payments usually being settled by differences through a clearing house. Because traders usually form a ring around the person calling out the prices, this form of market is often called ring trading. This method of trading is also called open outcry, as bids and offers are shouted out during the course of the callover. Research Callover
 
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