雅虎财务指标和增长率计算

Question

我正在尝试创建从雅虎财经下载数据后三十天内的增长率。我使用了以下代码和函数，但我的输出在所有天（1-30）天的生长中打印相同的数字。感谢任何帮助。

# Extracting data from yahoo finance
    
    import pandas as pd
    import requests
    import yfinance as yf
    import numpy as np
    import matplotlib.pyplot as plt
    import time
    import datetime

    symbols = ['MSFT', 'HD', 'TSLA']
    stocks_df = pd.DataFrame({'A' : []})
    symbols_daily = yf.download(symbols,
                     period = "max",
                     interval = "1d")
    for i,ticker in enumerate(symbols):
    print(i,ticker)

  # Work with stock prices
  historyPrices = yf.download(tickers = ticker,
                     period = "max",
                     interval = "1d")

  # generate features for historical prices, and what we want to predict
  historyPrices['Ticker'] = ticker
  historyPrices['Year']= historyPrices.index.year
  historyPrices['Month'] = historyPrices.index.month
  historyPrices['Weekday'] = historyPrices.index.weekday
  historyPrices['Date'] = historyPrices.index.date

  if stocks_df.empty:
    stocks_df = historyPrices
  else:
    stocks_df = pd.concat([stocks_df, historyPrices], ignore_index=True) and 

I created the function: 
**# function to create growth**

    def get_growth_df(df:pd.DataFrame)->pd.DataFrame:
      for i in range(1, 31):
        df['future_growth_'+str(i)+'d'] = df['Adj Close'].shift(-1) / df['Adj Close']
        GROWTH_KEYS = [k for k in df.columns if k.startswith('future_growth_')]
      return df[GROWTH_KEYS]

get_growth_df(historyPrices).describe()

这三十天的每一天都给我相同的值。

我期待这三十天的成长中的每一天都会发生这样的事情。 在此输入图片描述

Answer 1

你不断变换

-1

而不是

-i