... 规模经济 scale economcies 买方出价与卖方要价之间的差价 bid-ask spreads 期货（股票） futures ...
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From the angle of 10-minute trading session, bid-ask spreads of sequential two trading periods after opening market have statistical and significant differences from the last 10-minute trading session, respectively.
从交易时段来说，开市后连续两个时段的买卖价差分别和最后一个时段有显著性差异。
参考来源 - 基于市场微观结构的上海股票市场买卖价差的实证研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Liquidity in banned shares is down and bid-ask spreads are up.
被禁止卖空的股票流动性下降，买卖差价增加。
More liquid markets generally result in narrower bid-ask spreads, which means better prices for traders.
流动性更强的市场通常导致买卖价差更小，而这意味着交易商的价格更有利。
But that assumes the FTT will not simply be passed on to end-customers, either directly by affected institutions or as reduced liquidity leads to wider bid-ask spreads.
但这里的假设是金融交易税不会直接转嫁给终端客户——或者通过直接受影响的机构、或者由于流动性下降导致的买卖差价的变大。
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