目的：减小寸头
操作：卖出持仓Jun160靠，买进Jan175靠，卖出Jan210靠。或会随时改单。
预判：看涨，但略减仓锁利，以预防双头形成。若遇调整或可赎回Jan210靠加大寸头。
风险：到期收于165之下亏废。高风险
回报：如果到期收于210之上ROI回报100%
YMYD
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