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Work-outs

Work-outs (often referred to as Arbitrage) are securities whose financial results depend on a specific corporate action—such as a merger, liquidation, reorganization, or spin-off—rather than the general direction of the stock market.

📍 Origin

The category was first defined in the 1957 Letter.

"These are securities whose financial results depend on corporate action... rather than supply and demand for the stock. They are a predictable group, and in a year when the market is down as a whole, they will outperform the market."

📅 Chronological Evolution

  • 1960 Letter: Buffett outlines the "non-correlated" nature of work-outs.

    • Quote: "We try to have a large enough group of these so that we can have a predictable result regardless of what the Dow does."
    • Shift: He notes the use of leverage (borrowed funds) to finance these positions, up to 25% of the partnership's net worth.
  • 1962 Letter: Introduction of hedging.

    • Shift: For the first time, Buffett mentions using Short Selling to reduce market risk in specific work-outs. This was a response to the volatile market of 1962.
  • 1964 Letter: "Creating" Work-outs.

    • Logic: Buffett describes situations where the partnership buys a large enough block (but not yet control) to effectively "create" a work-out by forcing a tender offer or liquidation.
    • Quote: "In some cases we have a large enough position to influence the corporate action, changing a 'General' into a 'Work-out'."
  • 1987 Letter: Long-term Track Record.

    • Stats: Buffett reveals that over several decades, Berkshire's arbitrage operations have averaged annual pre-tax returns of at least 25%.
    • Scale: In 1987, Berkshire practiced arbitrage on a limited scale, with the only major position ($50M+) being Allegis (cost $76M, market value $78M).
    • Risk Warning: Buffett notes that while returns are high, a "really bad experience or two" can change the figures dramatically, referring to the losses many arbitrageurs suffered in the October 1987 crash (though Berkshire remained profitable).

🔗 Connections

🌱 Idea Evolution & Maturity

How this concept developed over time, tracking its transformation from an early practice to a formalized Berkshire pillar.

📊 Interactive Heatmap & Comparison →
1
Seed Stage

The Graham Arbitrage

1956 - 1969
Strategic Catalyst
Buffett's early days at Graham-Newman and the Buffett Partnership.
Operational Shift

Buffett engages in 'work-outs'—merger arbitrage, liquidations, and reorganizations—as a way to generate uncorrelated returns.

Philosophical Shift

Work-outs provide a place to park cash where the return depends on corporate events rather than market movements.

Work-outs are securities whose financial results depend on corporate action rather than supply and demand factors in the stock market.

1988 Letter
2
Named Stage

The Formal Category

1970 - 1988
Strategic Catalyst
The restructuring of Berkshire's investment reporting.
Operational Shift

Buffett formally classifies 'work-outs' as one of the major categories of Berkshire's equity investments.

Philosophical Shift

When markets are overvalued, work-outs offer a mathematically definable return that is independent of market crashes.

We use work-outs to keep our money busy when we can't find good long-term investments.

1988 Letter
3
Defined Stage

The Arcata Lesson

1989 - 2000
Strategic Catalyst
The massive, complex arbitrage in Arcata Corp.
Operational Shift

Buffett details the math of risk arbitrage: probability of success, time to completion, and opportunity cost.

Philosophical Shift

Arbitrage is not risk-free. If a deal breaks, the loss is usually massive compared to the potential gain. You must price the risk perfectly.

To evaluate an arbitrage situation, you must answer four questions... the most important is 'what is the chance the deal breaks?'

1989 Letter
4
Mature Stage

The Sidelined Strategy

2001 - Present
Strategic Catalyst
Berkshire's massive growth in asset size.
Operational Shift

Work-outs become an insignificant part of Berkshire's strategy because the absolute dollar returns are too small to move the needle.

Philosophical Shift

The strategy works, but it does not scale to hundreds of billions of dollars. Berkshire transitions fully to 'permanent' equity holdings and wholly-owned businesses.

The days of us making significant money from work-outs are over. We are simply too big.

2010 Letter

📚 Historical Mentions & Citations (6)

Click a reference document below to expand and read the exact paragraph(s) containing this concept in the archive.

📜
1957 LetterExcerpt Available
My view of the general market level is that it is priced above intrinsic value. This view relates to blue-chip securities. This view, if accurate, carries with it the possibility of a substantial decline in all stock prices, both undervalued and otherwise. In any event I think the probability is very slight that current market levels will be thought of as cheap five years from now. Even a full-scale bear market, however, should not hurt the market value of our work-outs substantially. The market decline has created greater opportunity among undervalued situations so that, generally, our portfolio is heavier in undervalued situations relative to work-outs than it was last year. Perhaps an explanation of the term "work-out" is in order. A work-out is an investment which is dependent on a specific corporate action for its profit rather than a general advance in the price of the stock as in the case of undervalued situations. Work-outs come about through: sales, mergers, liquidations, tenders, etc. In each case, the risk is that something will upset the applecart and cause the abandonment of the planned action, not that the economic picture will deteriorate and stocks decline generally. At the end of 1956, we had a ratio of about 70-30 between general issues and work-outs. Now it is about 85-15.
📜
1958 LetterExcerpt Available
The higher the level of the market, the fewer the undervalued securities and I am finding some difficulty in securing an adequate number of attractive investments. I would prefer to increase the percentage of our assets in work-outs, but these are very difficult to find on the right terms. To the extent possible, therefore, I am attempting to create my own work-outs by acquiring large positions in several undervalued securities. Such a policy should lead to the fulfillment of my earlier forecast – an above average performance in a bear market. It is on this basis that I hope to be judged. If you have any questions, feel free to ask them.
📜
1960 LetterReference Only

Mentioned in this document.

📜
1962 LetterExcerpt Available
Many times generals represent a form of "coattail riding" where we feel the dominating stockholder group has plans for the conversion of unprofitable or under-utilized assets to a better use. We have done that ourselves in Sanborn and Dempster, but everything else equal we would rather let others do the work. Obviously, not only do the values have to be ample in a case like this, but we also have to be careful whose coat we are holding. The generals tend to behave market-wise very much in sympathy with the Dow. Just because something is cheap does not mean it is not going to go down. During abrupt downward movements in the market, this segment may very well go down percentage-wise just as much as the Dow. Over a period of years, I believe the generals will outperform the Dow, and during sharply advancing years like 1961. This is the section of our portfolio that turns in the best results. It is, of course, also the most vulnerable in a declining market, and in 1962, not only did we not make any money out of our general category, but I am even doubtful if it did better than the Dow. Our second category consists of "work-outs. These are securities whose financial results depend on corporate action rather than supply and demand factors created by buyers and sellers of securities. In other words, they are securities with a timetable where we can predict, within reasonable error limits, when we will get how much and what might upset the applecart. Corporate events such as mergers, liquidations, reorganizations, spin-offs, etc., I lead to work-outs. An important source in recent years has been sell-outs by oil producers to major integrated oil companies. We were fortunate in that we had a good portion of our portfolio in work outs in 1962. As I have said before, this was not due to any notion on my part as to what the market would do, but rather because I could get more of what I wanted in this category than in the generals. This same concentration in work-outs hurt our performance during the market advance in the second half of the year.
📜
1964 LetterReference Only

Mentioned in this document.

📜
1987 LetterReference Only

Mentioned in this document.