判定重复丢弃
原始素材 #57
内容
来源类型量化博客聚合
中文翻译
基本面回测中的前瞻性偏差:66天,实测数据 [Tradevo Data]
如果你的回测系统在财报期末日期(fiscal-period-end date)上关联基本面数据,那么你实际上是在用尚不存在的数字进行交易。这就是整个漏洞——一句话就能说清楚。一家公司的财政年度结束后,还要再等数周,10-K年报才会被提交,相关数字才会公之于众。如果关联日期用错,回测中的每一个基本面数据点都会提前出现。我们对这种"提前"程度进行了实测。在整个
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Lookahead Bias in Fundamental Backtests: 66 Days, Measured [Tradevo Data]
If your backtest joins fundamentals on the fiscal-period-end date, it is trading on numbers that did not exist yet. That's the whole bug, in one sentence. A company's fiscal year ends, and then weeks later a 10-K gets filed and the numbers become public. Join on the wrong date and every fundamental data point in your backtest arrives early. We measured how early. Across the
已丢弃
丢弃原因AI自动判断:该素材讨论的是基本面回测中的前瞻性偏差(look-ahead bias)问题,即财报期末日期与实际数据可得日期之间的滞后关系,属于回测方法论/数据处理技术问题,不涉及任何可辨认的市场定价机制或交易机会,故判定为无机制。