我如何计算从开始期开始的累计百分比变化 [英] How can I calculate cumulative percentage change from beginning period

问题描述

我正在尝试创建具有滚动累积百分比更改的DataFrame.我想显示从初始购买日期(2014-09-05)起股票的百分比变化.

I am trying to create a DataFrame with a rolling cumulative percentage change. I would like to show the percentage change of the stock from the initial buy date (2014-09-05).

import pandas as pd
import pandas.io.data as web

cvs = web.get_data_yahoo('cvs', '2014-09-05')['Adj Close']

cvsChange = cvs[1:] / cvs.shift(1) - 1

推荐答案

谢谢@EdChum

我要找的是...

PriceChange = cvs.diff().cumsum()
PercentageChange = PriceChange / cvs.iloc[0]

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