In the stock market, the most dangerous of all emotions is greed, but fear is a close second.
Investors
Ken Fisher
Born in 1950 in California, Kenneth Fisher is the founder and executive chairman of Fisher Investments. Building on the growth-stock lineage of his father Philip Fisher while adding a distinctive behavioral-finance perspective, he wrote the longest-running column in Forbes magazine history — thirty-three years of 'Portfolio Strategy.' An author of eleven books, he is both a practitioner and the investment industry's preeminent communicator, with an estimated net worth of roughly $13.2 billion as of January 2026.
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Ken Fisher's Other Quotes
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In this business, if you're good, you're right six times out of ten. You're never going to be right nine times out of ten.
-- Peter Lynch
You can't predict. You can prepare.
-- Howard Marks
The most important thing is being attentive to cycles.
-- Howard Marks
The markets teach you humility every single day.
-- Ken Griffin
It's not whether you're right or wrong that's important, but how much money you make when you're right and how much you lose when you're wrong.
-- George Soros
I'm only rich because I know when I'm wrong.
-- George Soros