Fear Mosquitoes, Not Investing: Ben Carlson Tells Us to Learn to Love Stocks

John CoumarianosHenry Ford said history was bunk. But, in his new book, “Risk & Reward: How to handle market volatility and build long-term wealth,” Ben Carlson relies on history to defend investing in U.S. stocks.

Carlson calls the U.S. stock market “the greatest wealth-building machine ever created,” and nudges his readers into thinking its success will continue.

Like many analysts and strategists who came of age after the financial crisis and latched onto indexing (surely a benefit compared to the alternative), Carlson delivers a blizzard of historical data showing how well U.S. stocks have done under different circumstances. And perhaps with a kind of wink and a nod (because who knows the future?), he implies that the future should resemble the past.

Whether they know it or not, the post-crisis upstarts like Carlson, who are now the establishment, are indebted deeply to Daniel Kahneman’s and Amos Tversky’s 1979 paper on “prospect theory,” which argues that human beings do not maximize “expected utility,” and experience loss more painfully than they experience gain as satisfying.

Mosquito Worry

The first chart in the book displays that debt. It’s not about investing. Instead, it shows that more than 800,000 people per year are killed by mosquitoes while less than 10 are killed by sharks, despite the more prevalent fear of the latter. In other words, human beings misjudge risk badly.

So, now that you’ve slathered on your mosquito repellent after taking that refreshing dip in the ocean, are you investing after a bad month or year? Or a good month or year? Or maybe at an all-time high? In any case, no problem.

In the past, any of these moments has been a good time to invest in stocks, especially if you have time to ride out volatility. Carlson has the charts to prove it, many of them breathlessly discussed in the first pages of the book. The implication is that history will repeat.

Any available data shows that stocks have done well and beaten inflation handily for a century. But for five- and 10-year periods — and even longer — things are less certain, as Carlson’s own blog post from 2014 that inspired the book shows. "What if You Only Invested at Market Peaks?" reveals things that create problems for his argument.