什么是夏普比率，每个人怎么会弄错呢？
What is the Sharpe Ratio, and how can everyone get it wrong?
摘要：
夏普比率是量化金融界使用最广泛的风险度量标准--令人惊讶的是，基本上每个人都会错。在本说明中，我们将作出不切实际的努力来纠正这种情况。
英文摘要：
The Sharpe ratio is the most widely used risk metric in the quantitative finance community - amazingly, essentially everyone gets it wrong. In this note, we will make a quixotic effort to rectify the situation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
