You can't really teach someone to be a great investor. But you can teach them to avoid the common mistakes.

Investors
Joel Greenblatt
Born in 1957, Joel Greenblatt is the founder of Gotham Capital and an adjunct professor at Columbia Business School. He devised the 'Magic Formula' — a system that ranks stocks by just two metrics, earnings yield and return on invested capital — and demonstrated that it consistently beats the market. A rare figure who straddles academia and practice, he has worked to make value investing accessible to everyone.
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Joel Greenblatt's Other Quotes
Buying good companies at bargain prices is the secret to making a lot of money.
The magic formula works, but most people don't have the patience to stick with it.
Choosing individual stocks without any idea of what you're looking for is like running through a dynamite factory with a burning match.
The stock market is there to serve you, not to instruct you.
Related Quotes
Choosing individual stocks without any idea of what you're looking for is like running through a dynamite factory with a burning match.
-- Joel Greenblatt
The investor's chief problem — and even his worst enemy — is likely to be himself.
-- Benjamin Graham
The checklist is there to protect me from myself.
-- Guy Spier