Options margins tend to be the dollars or safety that traders need to submit on the broker as collateral before producing or providing options. 獎金，津貼；加價；附加費 We are ready to shell out a premium for the most effective area. 為了得到最好的地段，我們願意多付些錢。 A call option could be contrasted by using a set option, https://samamoo.com/category/business/investing/option-trading