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To be uncertain is to be uncomfortable, but to be certain is to be ridiculous.

( Proverb )

Amateurs want to be right. Professionals want to make money.

( General )

Only when the tide goes out do you discover who’s been swimming naked.

( Warren Buffett )

No matter what kind of math you use, you wind up measuring volatility with your gut.

( Ed Seykota )

Buy not on optimism, but arithmetic.

( Benjamin Graham )

Large price changes tend to be followed by more large changes, positive or negative. Small changes tend to be followed by more small changes. Volatility clusters.

( Benoit B. Mandlebrot )

Bull markets are born on pessimism, grow on skepticism, mature on optimism, and die on euphoria.

( Sir John Templeton )