根据投资者所买进和卖出的期权的不同，比率 价差 可分为看涨期权的比率 价差 ( ratio call spread )和看跌期权的比率 价差 (ratio put spread)两种。
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七、正向比率看涨期权套利(Ratio Call Spread)——中性市场 八、正向比率看跌期权套利(Ratio Put Spread)——中性市场
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ratio call spread
比率认购价差
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The largest single trade on YHOO today, a one-by-two ratio call spread, suggests the price of the underlying may post limited gains during the first seven months of 2012.
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