title: How can I using yfinance to get fundamental ratios ( such as P/E, P/B )
body: <p>I've been wondering how can I get a series fundamentals such as P/E ratio of a company using yfinance. historical ratios for multiple company .</p>
  
  <p>I have tried </p>
  
  <pre><code>import yfinance as yf
  rio=yf.Ticker("RIO.AX")
  rio.financials 
  </code></pre>
  
  <p>but my result give me the empty data frame 
  anyone can help? or any documentation I can be able to read
  thanks a lot</p>