I am a big P/E (price vs earnings) fan. Value companies typically around 10. Growth companies usually exceed 20. IMHO anything over 40 is too risky. Although

I am a big P/E (price vs earnings) fan. Value companies typically around 10. Growth companies usually exceed 20. IMHO anything over 40 is too risky. Although this would prevent me from being an early investor in many successful companies. It also keeps me away from the larger number of failures. <edit> For what it is worth, they have trailing P/E (history) vs foreword P/E which is expected. As of today NVIDIA Trailing P/E is 33.24 and forward is 24.75.