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The Best Interest » Fewer Needles, Bigger Haystack

Fewer Needles, Bigger Haystack

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I wrote this article below in 2023.

There’s new data today, and it’s even more interesting. The result is clear: Good luck picking individual stocks over the long run.

Researcher Henrik Bessembinder published a new study on the history of the U.S. stock market. Some of the most interesting facts from Bessembinder’s paper are:

  • He looked at data for 29,081 stocks that were publically traded at some point between 1926 and 2025
  • The full data set yields a compound average return of 10.1% per year
  • Only ~48% of the stocks generated a positive return.
  • Only ~41% of the stocks generated a return greater than one-month Treasury bills (the “risk-free” return)
  • Only ~28% of the stocks outperformed “the market”

Bessembinder then introduces a term he calls “Shareholder Wealth Creation” (SWC), with a few small twists on classic performance data. But by and large, SWC is simply a way of measuring how stocks create wealth for their investors.

The total SWC through 2025 across the 29,081 companies over the last 100 years totaled to $90.96 trillion. The data here is amazing.

  • Only 46 companies (out of 29,081) account for 50% of that $90.96 trillion. That’s 0.16%.
  • And 1082 companies account for 100% of the $90.96 trillion. That’s 3.72%.
thread passing through eye of needle

How can 3.72% of companies create ALL the wealth in the stock market?

Let’s start with the worst companies. Bessembinder found that 17,197 companies reduced shareholder value, and did so by a total of $10.67 trillion. So we’re below zero.

It then takes the next 10,802 decent companies to generate a positive $10.67 trillion, bringing the net value creation back to zero.

Summing those two groups, we have 27,999 companies “generating a total of zero net wealth enhancement, as they collectively match Treasury bill outcomes.”

That leaves the remaining 1,082 best companies in the study, which account for all $90.96 trillion of net positive wealth creation.

stacks of dry hay in barn

The most charitable conclusion here is that:

59% of the haystack is rotten, but at least 41% of the haystack is semi-decent, with a sliver of that 41% being outright great.

59% though! That’s not good.

But I think the better, more realistic conclusion is that:

96% of the haystack is a waste of time. Less than 4% provides a true return on investment.

The stock market has few needles. Missing out on them negates the purpose of stock investing in the first place. Your best bet – literally – is buying the whole haystack.

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