n.衣領；?領子；?（狗等的）項圈；?（管子或機器部件的）圈
vt.抓住，逮住；?扭住領口；?拉用，扯用；?給…套上頸圈
股票期權的交易策略?（3）--?Collar?Trade?Strategy
Collar?Trade?Strategy?The?collar?is?a?good?strategy?to?use?if?the?options?trader?is?writing?covered?calls?to?earn?premiums?but?wish?to?protect?himself?from?an?unexpected?sharp?drop?in?the?price?of?the?underlying?security.
In finance, a collar is an option strategy that limits the range of possible positive or negative returns on an underlying to a specific range.