Buffett's 2023 Shareholder Letter: Munger's Role as 'Architect' and Distinguishing Operating Earnings

In the 2023 shareholder letter, Warren Buffett first mourned the recently deceased Charlie Munger and reviewed Munger's influence on Berkshire's investment philosophy. Buffett recalled that in 1965, Munger bluntly advised him: "Warren, forget about ever buying another company like Berkshire. But now that you control Berkshire, add to it wonderful businesses purchased at fair prices and give up buying fair businesses at wonderful prices." This advice prompted Buffett to adjust his strategy, but the original text explicitly noted that this process was not instantaneous; rather, it involved backsliding and struggle: "With much back-sliding I subsequently followed his instructions." Munger later became Buffett's partner and, when Buffett's old habits resurfaced, he "repeatedly, jerked me back to sanity." This shift from Graham-style "cigar-butt" investing to holding high-quality assets was described by Buffett as a gradual process requiring constant vigilance, rather than a simple break. Consequently, Munger was called the "architect" of Berkshire by Buffett, while Buffett viewed himself as the "general contractor" executing that vision.

Beyond the historical review of strategic transformation, the letter also clarified financial concepts often confused by investors, particularly the difference between GAAP net earnings and operating earnings. Buffett pointed out that "Net earnings (loss)" in official annual reports includes unrealized capital gains or losses, which fluctuate wildly and often mislead readers. For example, GAAP net earnings for 2021, 2022, and 2023 were $90 billion, negative $23 billion, and $96 billion respectively, with such dramatic volatility primarily stemming from daily stock market fluctuations. In contrast, Berkshire places greater emphasis on "operating earnings," which represent core business profitability excluding unrealized capital gains and losses. The corresponding figures for the same period were $27.6 billion, $30.9 billion, and $37.4 billion, showing a steady growth trend. Buffett emphasized that while capital gains are an important component of Berkshire's value appreciation, judging a company's investment value based on "earnings" that include short-term market volatility is absurd. He quoted Benjamin Graham's famous saying: "In the short run the market acts as a voting machine; in the long run it becomes a weighing machine," reminding investors to focus on the accumulation of intrinsic corporate value rather than instantaneous stock price fluctuations.