The Columbia disaster appears as a twofold test of collective judgment. After the shuttle disintegrated during reentry in 2003, investors drove down the stock of Alliant Techsystems, the current owner of Thiokol, the booster-rocket manufacturer implicated in the Challenger disaster. That reaction proved to be a misleading repetition: evidence pointed instead to foam insulation striking the Columbia’s wing during launch. The disaster also figures in a critique of the mission team’s procedure: its members reported on different aspects of the flight, but the team never voted or otherwise combined their opinions into a decision.

The market’s mistaken precedent

In 1986, the stock market had rapidly singled out Morton Thiokol after the Challenger explosion, even though no public comment on the day identified the company as responsible. The company’s stock fell much more sharply than those of the other major contractors, and a later investigation confirmed that cold weather had made its booster O-ring seals less resilient, allowing hot gases to escape and ignite the main fuel tank. That episode supplied a striking instance of investors apparently identifying responsibility before it was publicly established.

The Columbia disaster exposed the danger of treating that earlier success as a reusable answer. On the day the shuttle disintegrated during reentry, Alliant Techsystems stock plummeted. Alliant was then the owner of Thiokol, which still made shuttle booster rockets, so traders effectively assumed that the contractor linked to the Challenger disaster was implicated again. But the Columbia disaster appeared to have a different cause: foam insulation struck the shuttle’s wing during launch. The market’s fallible response shows how a crowd can draw on a precedent not as one piece of evidence among others, but as a ready-made explanation.

What the comparison reveals about markets

The contrast between the two disasters qualifies the idea that market prices reliably aggregate dispersed information. The 1986 reaction unfolded in what the account describes as a relatively pristine environment: there were no precedents to guide investors and no preconceived crowd wisdom shaping their opinions. The 2003 decline, by contrast, reflected imitation of the earlier judgment. Investors were prone to herd, and the memory of the Challenger episode could carry a once-accurate conclusion into a new case where it did not fit.

The comparison therefore distinguishes collective judgment from mere repetition. In the Challenger case, buyers and sellers appeared to arrive at a correct identification without an identifiable public accusation or a clear explanation of how the information had reached them. The Columbia response demonstrates that the same market can instead mistake an old pattern for present knowledge. A collective verdict may be informative, but its force does not guarantee that its reasoning is sound.

The mission team and the missing vote

The disaster also illustrates a separate organizational problem. The mission team’s members reported on different aspects of the flight, yet their actual opinions were never aggregated: the team never voted on anything. The criticism is procedural as well as retrospective. Even if the shuttle had returned safely, a team that gathers reports but does not turn them into a collective judgment has not used the central advantage of group decision-making.

This point is set against evidence that small groups can make decisions both accurately and quickly. In experiments designed by Alan S. Blinder and John Morgan, groups detected a change in the proportions of colored balls in an urn faster and more accurately than individuals; they identified the direction correctly 89 percent of the time, compared with 84 percent for individuals, and outperformed even the best individual. The comparison does not establish that a vote alone would have prevented the Columbia disaster. It clarifies the narrower lesson: a group’s members may possess relevant information, but without a method for combining their judgments, that information remains unconverted into collective decision.