V2EX bid-ask-spread

Bid-Ask Spread

定义 Definition

Bid-ask spread 指金融市场中某一资产的买入价(bid,出价)卖出价(ask,叫价)之间的差额。它常被用来衡量交易成本市场流动性:价差越大,通常表示交易成本更高、流动性更弱(或信息不对称更强)。除这一常见用法外,在不同市场结构下它也可引申为对做市商补偿与风险的综合体现。

发音 Pronunciation (IPA)

/bd sk sprd/

例句 Examples

The bid-ask spread is only one cent on this stock.
这只股票的买卖价差只有一美分。

During market stress, the bid-ask spread can widen sharply, increasing execution costs for large orders.
在市场承压时,买卖价差可能明显扩大,从而提高大额订单的成交成本。

词源 Etymology

该短语由三部分构成:bid(买方出价)+ ask(卖方要价/报价)+ spread(差距、价差)。它源自交易场所与做市制度中的报价习惯:市场同时展示“愿意买的价格”和“愿意卖的价格”,两者之间的“间隔”即为 spread,后来固定为金融微观结构领域的核心术语。

相关词 Related Words

ul>
  • Bid
  • Ask
  • Spread
  • Liquidity
  • Slippage
  • Market Maker
  • Order Book
  • Transaction Cost
  • Volatility
  • Market Microstructure
  • 文学与著作中的用例 Literary Works

    • Trading and Exchanges: Market Microstructure for Practitioners(Larry Harris)
    • Market Microstructure Theory(Maureen O’Hara)
    • Options, Futures, and Other Derivatives(John C. Hull)
    • A Random Walk Down Wall Street(Burton G. Malkiel,常在讨论交易成本与市场效率时提及买卖价差)
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