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全权委托单属性让您能有机会通过一个委托单同时提供流动性和占用流动性。此类委托单会在用户指定的限价基础上应用一个特定的全权委托偏离金额,如3.20美元的限价,加3美分的全权委托单偏离金额。如果提交的委托单不能立即成交,则其会挂在委托单册上,提供流动性。全权委托金额可让您的委托单参与价格改善竞价,同时又能在机会出现时占用流动性。
对于指定限价设定在价格层级之间的期权委托单,您可以通过在全局配置下的委托单页面勾选为5/10美分定价期权提交委托单来让TWS创建全权委托单。
注意,如果您的期权委托单当前无法成交,则您是在提供流动性,因此您的委托单有可能可以获得费用返还。提交全权委托单可能有两种结果:
当您选择使用全局配置下的复选框创建全权委托单时,系统会根据输入的限价(无论是买单还是卖单)以及市场决定的价格增量来确定全权委托金额。如果限价落在期权的正常价格层级之间,则委托单将按全权委托单提交,限价为下一个更低(买单)或更高(卖单)的5美分或10美分价格层级增量,全权委托金额为您指定限价与5美分或10美分之间的差值。
大多数期权的正常价格层级(没有参加Penny Pilot计划的期权)
例如:
如果限价 = 2.43
买单:向下取整到2.40,全权委托金额为0.03
卖单:向上取整到2.45,全权委托金额为0.02
如果限价 = 3.23
买单:向下取整到3.20,全权委托金额为0.03
卖单:向上取整到3.30,全权委托金额为0.07
有部分期权参加了Penny Pilot计划。参加了Penny Pilot计划的期权其正常的价格层级为:
例如:
如果限价 = 2.43
买单:以限价提交委托单,无全权委托金额。
卖单:以限价提交委托单,无全权委托金额。
如果限价 = 3.23
买单:向下取整到3.20,全权委托金额为0.03
卖单:向上取整到3.25,全权委托金额为0.02
有关交易所费用的更多信息,请参见期权产品页面。