Public stock markets are exchanges to buy and sell shares in big companies. Most days most people involved are trying to solve some problem. Share prices go up when there is more demand, reflecting market conditions, innovations and/or a story about the future, and they go down when there is less demand.
Shorter-term business cycles (a few years) rotate longer-term secular trends (decades). Investors try to make money by putting this all together into a theory about the world. Different eras call for different strategies. For example, more than three-quarters of the gains in the American stock market between 1982 and 2000 were from rising price-to-earnings multiples (how much more expensive stocks got), rather than rising corporate profit (how much more efficient companies got). Over those 20 years, one could have called stocks “too expensive” and been wrong, until the very end, when a correction brought a big reset. “Fair value” is just just a mark in a continuum on the path from the start to the end of a bull market. Gotta pick your bets.
That’s from How Not to Invest, a book out this year from the investor Barry Ritholtz, who is a frequent writer and speaker.
The reason his book as a negative title? His big idea? A tiny sliver of any competitive field, including wealth accumulation, play the “winner’s game,” in which they’re competing on expertise. The rest of us play the “loser’s game,” as an analyst called it, in which we just try to avoid unforced errors. It’s true in tennis, and in money management. Just be smart, cautious and consistent and you’ll outperform most of the rest.
The book’s foreward was written by Morgan Housel, another wealth manager who is active online and whose Psychology of Money was a bestseller in this tradition of the approachable personal finance books. Ritholtz’s book is longer and more tactical, but continues the tradition of introducing broader strategy and worldview.
He brings up lots of familiar, but effective, truths from psychology and other social sciences.
For one, he brings up the evolutionary mismatch hypothesis, which suggests that traits beneficial in our ancestral past, like craving sugar or storing fat, become detrimental in the rapid, modern world, leading to modern diseases like diabetes, obesity, and inflammation, because our ancient biology hasn’t caught up to today’s vastly different environments (e.g., sedentary lifestyles, abundant processed foods, constant stress). It’s also why basic personal finance strategies are so hard, even if the research has been so dependably clear for decades: put little bits into a diversified portfolio with the lowest fees possible.
Then again, when it goes wrong, as investor Howard Marks wrote: “Experience is what you got when you didn’t get what you wanted.”
Below I share my notes from the book for future reference.
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