Key Takeaways

  • An entrepreneur turned investor generated a 21.8% annual return over 12 years, beating the S&P 500 average of 13.5% and outperforming the index in 11 out of 12 years.
  • Sam Parr fed the portfolio into Claude and found the investor averaged only 2.9 buy or sell decisions per year.
  • The account saw zero transactions between 2022 and 2025, outperforming during a volatile cycle through deliberate inaction.
  • High returns came from Warren Buffett's principle of “lethargy bordering on sloth,” which runs counter to the standard founder impulse toward constant tinkering.
  • Before backing an idea, operators like Jack Dorsey write exhaustive pre-mortems, such as listing 140 reasons a business will fail, to filter for high conviction.

The Claude Audit of a 22% Portfolio

Parr recently looked at the personal trading records of an entrepreneur friend who shifted into investing. Over a 12-year period, the account generated a 21.8% average annual return. The S&P 500 returned 13.5% over the same window. Even more unusual: the portfolio beat the index in 11 out of those 12 years.

Parr wanted to see the exact mechanics behind that consistency. He exported the full transaction history from the brokerage account and dropped the data into Claude.

“We asked it over the last 12 years how many decisions did you make a year?” Parr said. “A decision is defined as how many stocks you bought or sold in a year.”

The answer was 2.9 decisions per year.

The investor went entire calendar years without placing an order. Shaan Puri pointed to the longest lull in the data: “For 3 years, he did nothing. That was the longest stretch of no activity. That was 2022 to 2025. And it looks like he beat the market 11 out of 12 years.”

Sloth Beats Founder Restlessness

Founders are wired to believe that effort equals output. If pipeline drops, you write new email sequences. If retention dips, you push a product update. In operating a company, constant motion is how you search for signal.

In capital allocation, that restless energy usually destroys returns. Every trade creates tax drag, trading fees, and chances to misread market noise. Parr noted that Buffett built his entire reputation by avoiding that trap: “Warren Buffett he says his investment strategy is lethargy bordering on sloth that's like the cornerstone of his investment thesis.”

The investor Parr audited did not win by reacting to weekly economic headlines. “I study a few things that I can understand and I study them very deeply,” the investor told Parr. “I keep very detailed notes and then I just wait for an opportunity.”

Patience without preparation is just negligence. The edge comes from knowing three or four assets so thoroughly that you can act with total conviction when the price drops, and then do nothing for thirty-six months.

Write Down the Failure Modes First

Patience only works if your entry thesis is correct. Sitting still inside a failing company just guarantees a total loss. To survive a low-activity strategy, you have to run an aggressive pre-mortem before you spend a single dollar.

Puri cited the launch of Square to demonstrate how high-conviction thinkers pressure-test an idea: “And before he started Square, I think he created a list called 140 reasons why Square will fail. And he wrote down 140 reasons why.”

Listing 140 failure modes forces you to strip out blind optimism. If you can identify the structural risks before you enter, you avoid panic-selling when those exact risks surface in the news cycle later. You buy rare, obvious opportunities, and then you let inactivity do the heavy lifting.

What to Do With This

Export your investment trades or primary company initiatives from the past 24 months into an LLM and calculate your total number of major shifts. If you made more than five capital reallocations or strategic pivots in a year, write a 20-point pre-mortem listing every way your current core bet could fail, answer each risk in writing, and commit to zero new adjustments for the next 90 days.