Depreciation = worth originally from the 12 months (opening balance) + purchases during the year − price at the end of the yr (closing balance) “盈亏修正”主要指的是交易成本，通常在投机交易中占比较小。盈亏修正的计算实际上非常复杂，不同的交易所可能有不同的规则格式来规范交易行为。 "hitparade.ch - Discographie PNL". Hung Medien. Retrieved 26 September 2016. ^ a b c d e file g h i j k l m https://hughi531oyi4.shoutmyblog.com/profile