JIM O'SHAUGHNESSY

Investors are their own worst enemies. The data says one thing. They do the opposite.

The best strategies are boring. Boring is what compounds wealth over decades.

The market rewards factors, not feelings. Cheap stocks with momentum beat expensive stocks with great stories.

Curiosity is the most underrated investment edge.

I test every strategy against the data before putting a dollar behind it. If it doesn't work across 80 years, I don't use it.

The greatest risk in investing is not volatility. It's doing something stupid because you panicked.