John Maynard Keynes as an Investor: Timeless Lessons and Principles


As an active investor, I am always searching for guideposts that would help me avoid the perennial mistakes most investors make.

How do I avoid buying at the top of a market or jumping out when my entire portfolio gets whacked? How do I keep the faith when there’s turmoil aplenty, as was the case in 2008? How important are dividends in a downturn?

In the portfolios of the great economist John Maynard Keynes, I found some answers and reinforcement. Like Keynes, I did nearly everything wrong for years until I discovered a durable path to investment success. I speculated in commodities, dove into individual stocks on a whim and held onto losers far too long.

I found solace, though, when I examined Keynes’ investments, which span two world wars. Even though I and millions of others have weathered brutal markets in this century, they had nothing on Keynes, who was investing money for King’s College (Cambridge University), two insurance companies and private accounts for himself and his famous Bloomsbury friends.

Although he’s better known for his sweeping—and controversial—economic theories, Keynes was a fervent practitioner of capitalism. His rousing success as an investor shows how he embraced markets nearly all of his life.

Viewing his record as an investor, it’s ludicrous to call Keynes a socialist, which he wasn’t. Keynes genuinely enjoyed being a speculator and investor. He called his favorite stocks his “pets.” In addition to thinking through the ideas that would rescue Western economies (as well as Japan and eventually China) after two devastating cataclysms, he managed money for his own portfolio, his friends and several institutions.

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