Alex2022-08-29 19:45:48
关于Monte Carlo simulation 似乎好几个地方都有. 老师能不能帮忙总结一下在不同科目里面的优缺点?
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Chris Lan2022-08-30 22:42:44
同学您好
个人IPS的总结如下:
Monte Carlo simulation:蒙特卡洛模拟
◼ Advantages of Monte Carlo Simulation:蒙特卡洛模拟的优点
✓ Its applicability to the client’s actual asset allocation. 适用于客户的实际资产配置
✓ Aggregating the results of many trials of probability-based estimates of key variables, the overall probability of meeting retirement needs is generated, and it can flexibly model different scenarios and explore issues that are important to clients. 通过聚合许多基于概率的关键变量估计试验的结果,可以得出满足退休需求的总体概率,并且可以灵活地对不同的方案进行建模,并探索对客户重要的问题 ★
◼ Limitations of Monte Carlo Simulation:蒙特卡洛模拟的局限性
✓ It is only a method of estimation; it cannot predict the future. 这只是一种估计的方法;它无法预测未来 ★
✓ The output from Monte Carlo simulation can be highly sensitive to small changes in input assumptions. 蒙特卡洛模拟的输出对输入假设的微小变化非常敏感(输入变化一点,输出变化很大)★
✓ Monte Carlo output includes the probability of reaching a goal (or goals) but not necessarily the “shortfall magnitude.” 蒙特卡洛输出包括达到一个目标(或多个目标)的概率,但不一定是“缺口大小”
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资产配置中的总结如下:
蒙特卡洛模拟,解决MVO只考虑单阶段框架(single-period framework)的问题,方法:使用蒙特卡洛模拟
MCS优点
⚫ 蒙特卡洛模拟是多阶段的(multi-period),动态的(dynamic),由于现金流与收益的相互作用,财富的终值是路径依赖的(Terminal wealth is path dependent because of the interaction of cash flows and returns),例如投资者在投资期间额外注资或者取出部分资金,就会影响最终收益率
⚫ Paint a realistic picture of potential future outcomes. 预测未来潜在的结果的真实场景
⚫ 考虑路径依赖(path dependent),以及再平衡和税(rebalancing and taxes)的建模(model)
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