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In his 1961 letter to partners, Buffett laid out three broad categories of investments: generals, workouts, and controls. Generals were undervalued securities where Buffett had no say in corporate policies, nor a timetable for when the stock might reflect its intrinsic value. Buffett pointed out that the generals would behave like the Dow in the short term but outperform the index over the long term. Buffett expected to have five or six positions in this category that were 5% to 10% of total assets each, with smaller positions in another ten to fifteen. Later on, in his 1964 letter, Buffett would break generals into two categories: private owner basis and relatively undervalued. Private owner generals were generally cheap stocks with no immediate catalyst, while relatively undervalued securities were cheap compared to those of a similar quality. Relatively undervalued securities were generally larger companies where Buffett did not think a private owner valuation was relevant.173 Workouts were securities whose performance depended on corporate actions, such as mergers, liquidations, reorganizations, and spin-offs. Buffett expected to have ten to fifteen of these in the portfolio and thought this category would be a reasonably stable source of earnings for the fund, outperforming the Dow when the market had a bad year and underperforming in a strong year. He anticipated these investments would earn him 10% to 20%, excluding any leverage. Buffett would take on debt, up to 25% of the partnership’s net worth, to fund this category. While he didn’t disclose his allocation every year, he put around 15% of the partnership in workouts in 1966 but increased that to a quarter of the portfolio in 1967 and 1968, when he was having trouble finding bargains.174 The final category was controls, where the partnership took a significant position to change corporate policy. Buffett said these investments might take several years to play out and would, like workouts, have minimal correlation to the Dow’s gyrations. Buffett pointed out that generals could become controls if the stock price remained depressed.
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Brett Gardner (Buffett's Early Investments: A new investigation into the decades when Warren Buffett earned his best returns)