Yfinance period='Max' option bug

[LucGuj]

The yfinance version 0.1.70 shows a bug when it comes to download historical data using the period='max' option. In fact if I run the code below I get data starting from 1950 while the data go back to 1928 (colab link: https://colab.research.google.com/drive/1eByqpQGTxKH7KmYUy-FDri6HyYALKzzw#scrollTo=spxN65Qi4EJ4). As further validation if I run the same code using yfinance 0.1.63 I get the proper historical data starting from 1928 (colab link: https://colab.research.google.com/drive/1XvUF6ngMskT-aKduMTi_jgsvsRvSYLz_#scrollTo=iR3GS3f9kU3D)

import yfinance as yf

ticker = '^GSPC'
Stock = yf.Ticker(ticker)
Stock_Data = Stock.history(period="max",auto_adjust = False)

Stock_Data

Thanks in advance for your support and help
Luca

[ppeloton]

Raised #1169 request to fix issue