邵同学2024-01-14 12:21:03
Ben McNeil works as a senior manager at Chasing Alpha Research (CAR), a boutique investment house that specializes in managing portfolios for endowment funds. For the past year, CAR has been developing a machine learning (ML) algorithm that leverages frequently updated internal data (e.g., security weights, trades, and returns) and external data sources to construct individual stock portfolios within a pre-determined sector allocation range (–5% to +5% of benchmark). The goal of the portfolio is to outperform the benchmark over a 12-month period, and McNeil is reviewing the performance results to evaluate the effectiveness of the big data strategy. 老师您好,为啥根据这个消息,要用transaction base,不能用 holding base
回答(1)
开开2024-01-15 15:39:00
同学你好,这题的关键句有两个
1、这个策略leverages frequently updated internal data (e.g., security weights, trades, and returns)
2、to construct individual stock portfolios,说明这是一个选股的策略。
本来这三种方法中最精确的就是transaction based,但一般不用的原因是计算复杂且没有完整的交易数据。这个策略本来就是使用到内部数据,包括交易数据,因此具备了使用transaction based方法的条件,而且策略使用的数据是更新频率很高的,使用的数据频率高,产生的交易信号也频率高,结合这是个选股策略,那么比较频繁的个股交易,因此holding based不合适,它无法反应交易的影响。
Returns based一般是除了收益率数据其他详细的持仓或交易数据不可得的时候才用,现在交易数据是有的,那就不会采用这种不精确的方法
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