资产模型类型有三种: 1. core equity method 核心资产计算法 1)核心资产 = 初始资产 - 每单开仓时占用的资产。 2)每当平仓时,要重新计算核心资产。 3)新开仓位要建立在当前核心资产基础的函数上。 举例: 初始帐户现金50000, 每次开仓时以核心资产的10%开仓。 第一单为5000,开仓后, 这时的核心资产为45000,只要此单没平仓,不管浮动盈利还是浮动亏损, 核心资产不变,一直是45000. 第二单,第一单还未平仓时开第二单, SIZE = 45000×10%=4500, 这时的核心资产变为40500=50000-5000(第一单)-4500(第二单)。 第三单,在前两单未平仓情况下,第三单SIZE=当前核心资*10%=40500*10%=4050. 这时的核心资产变为36450. 2. total equity method 总资产计算法 (采用最多的方法) 总资产 = 现金+未平仓的当前价值 3. reduced total equity method 递减资产计算法 (前两种方法的综合) 递减资产 = 核心资产+当前已被锁定利润的未平仓的浮盈 举例:当前50000元的帐户, 开仓5000后,资产变为45000, 产生了2000的利润后,资产变以47000, 又回吐了1000的利润后,资产仍为47000,资产只会增大,不会减小。原因是用跟踪止损把利润锁定了。
我采用的是trade初的equities为初始资金E1。在整个trade过程,不管加仓,减仓,计算都按照E1来计算。风险都是以E1为基础的。待关闭trade的最后一个头寸,那么E1将被重新计算。 好像和上面3种都不一样。
这个似乎有误,产生了2000的利润,资产变成47000,我的理解是这2000的利润已经锁定了,也就是你说的跟踪止损锁定利润。那么如果又回吐1000的利润的话,按道理应该已经离场了才对,因为肯定已触发跟踪止损的止损线了。 我认为正确的描述应该是: 产生了4000的利润,其中2000的利润是被跟踪止损锁定的,于是资产变为47000。如果利润回吐1000,变成3000,但还未触及跟踪止损线,所以资产还是47000
可能我翻译的不好,下面是第三种的原文,欢迎探讨。 The reduced total equity method is a combination of the first two methods. It is like the core equity method in that the exposure allocated when you open a position is subtracted from the starting equity. However, it is different in that you also add back in any profit or reduced risk that you will receive when you move a stop in your favor. Thus, reduced total equity is equivalent to your core equity plus the profit of any open positions that are locked in with a stop or the reduction in risk that occurs when you raise your stop.5 Here’s an example of reduced total equity. Suppose you have a $50,000 investment account. You open a position with a $5,000 position sizing allocation. Thus, your core equity (and reduced total equity) is now $45,000. Now suppose the underlying position moves up in value and you have a trailing stop. Soon you only have $3,000 in risk because of your new stop. As a result, your reduced total equity today is $50,000 minus your new risk exposure of $3,000, or $47,000. The next day, the value drops by $1,000. Your reduced total equity is still $47,000 since the risk to which you are exposed if you get stopped out is still $47,000. It changes only when your stop changes to reduce your risk, lock in more profit, or close out a position.