The stock market is there to serve you, not to instruct you.

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
Choosing individual stocks without any idea of what you're looking for is like running through a dynamite factory with a burning match.
The magic formula works, but most people don't have the patience to stick with it.
Buying good companies at bargain prices is the secret to making a lot of money.
You can't really teach someone to be a great investor. But you can teach them to avoid the common mistakes.
Related Quotes
Some people get rich studying artificial intelligence. Me, I make money studying natural stupidity.
-- Carl Icahn
To buy when others are despondently selling and to sell when others are avidly buying requires the greatest fortitude and pays the greatest ultimate rewards.
-- Mark Mobius
The stock market is a giant distraction to the business of investing.
-- Ken Fisher
The key to investing is to be fearful when others are greedy, and greedy when others are fearful. But the real trick is figuring out the difference.
-- David Tepper
The market does not beat them. They beat themselves, because though they have brains they cannot sit tight.
-- Jesse Lauriston Livermore
There is nothing new in Wall Street. There can't be because speculation is as old as the hills.
-- Jesse Lauriston Livermore