公开喊价又称双向拍卖(Double Auction)，即买卖双方同时报价，主要使用在期货交易中。公开喊价是现代金融交易的一种重要手段，具有方便、透明的特点，随着经济全球化的不断发展，将会被广泛运用于金融交易中。
OTC市场是场外交易市场，不需要公开喊价。
OTC business is not traded on a regulated market and therefore does not require open-outcry.
根据公开喊价的原则，只有最好的买方报价和卖方报价可以报出。
The basis calls the principle of valence publicly, only best buyer quote and seller quoted price can sign up for piece.
股票曾经是通过公开喊价系统交易，证券交易所的交易员直接报出股价。
Once, stocks were traded through the open outcry system, with men Shouting share prices on the floors of stock exchanges.
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