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100 to 1 in the Stock Market, in detail
100 to 1 in the Stock Market, published in 1972 by Thomas Phelps, is a study of the conditions under which stocks return one hundred times an investor's original investment — and an argument that such stocks are more common and more identifiable in advance than most investors believe. Phelps spent his career as a broker and portfolio manager, and the book draws on his decades of observation of which companies produced extreme long-term returns and what they had in common.
Phelps's central argument is deceptively simple: the problem most investors face is not finding great companies — it's holding them long enough to realize their full potential. The investor who bought Xerox in the 1950s, Polaroid in the 1960s, or Walmart in the 1970s had many opportunities to sell at a good profit before the stock became a 100-bagger. Almost every great long-term investment goes through periods that justify selling — a poor quarter, a management change, a scary macro environment — and the investor who sells at any of those moments misses the compounding that follows.
The book catalogs historical examples of 100-to-1 returns with the kind of archival precision that requires knowing when a company was actually available as a public investment and at what price. Phelps is careful about this because the retrospective identification of great stocks is easy; the hard part is identifying the characteristics that were visible at the time. He argues the key requirements are: a business with strong reinvestment opportunities at high rates of return, management that is focused on long-term growth rather than near-term earnings, and a price that doesn't eliminate the return prospect at purchase.
The book occupies a specific niche in investing literature. It predates Peter Lynch's similar arguments in One Up on Wall Street and anticipates the "100 baggers" work Chris Mayer did in 2018, which credited Phelps as an inspiration. As investing wisdom, it is fundamentally about patience and the math of compounding — neither is complicated, but both are genuinely hard to execute in a market environment that rewards short-term attention. Phelps writes without academic apparatus and his examples are dated, but the core argument has not been superseded.
The big ideas
- 1.
100-to-1 returns (100 baggers) are rarer than average stocks but more common than most investors assume. Phelps documented dozens of them in the postwar American market.
- 2.
The hardest part of achieving a 100-bagger is not identifying it early — it's holding through the many plausible reasons to sell that appear long before the full return is realized.
- 3.
Businesses capable of 100-to-1 returns share common traits: high reinvestment rates, durable competitive advantages, and management that prioritizes long-term capital allocation over near-term earnings per share.
