title: wrong scale in yahoo finance python
body: <p>I am trying to download historical prices using yahoo finance for a few mutual funds and ETFs. I think there is a bug in Yahoo finance that confuses the scales of the prices (I don't think is a split issue. See pics below).</p>
  <p>In any case here is a MWE to reproduce the problem</p>
  <pre><code>import yfinance as yf
  import pandas as pd 
  from pandas_datareader import data as pdr
  yf.pdr_override()
  
  tickers = [&quot;0P0001FE43.L&quot;, &quot;0P00014IJX.L&quot;, &quot;SGLN.L&quot;]
  
  start_date = &quot;2019-01-01&quot; 
  today      = &quot;2021-04-27&quot;
  
  def getData(ticker):
          #print (ticker)
          data = pdr.get_data_yahoo(ticker, start=start_date, end=today)
          data[&quot;yahoo_ticker&quot;] = ticker
          files.append(data)
  
  files=[]
  for tik in tickers:
      getData(tik)
  
  df = pd.concat(files)
  df = df[ [ &quot;Adj Close&quot;, &quot;yahoo_ticker&quot;]]
  </code></pre>
  <p>A closer look at the adjusted prices would show that:</p>
  <p><a href="https://i.stack.imgur.com/9td4h.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9td4h.jpg" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/QqVV1.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QqVV1.jpg" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/Tfnq1.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Tfnq1.jpg" alt="enter image description here" /></a></p>
  <p>I couldn't think of any systematic way to correct for this problem, so would appreciate any help.</p>