The Line That Formed Itself

On the morning of January 30, 2023, a curious thing happened across corporate America. Within hours of one another, executives at companies that made chips, searched the web, sold office software, and delivered packages all announced something vaguely called an artificial intelligence strategy. Some of these companies had spent years building machine learning teams. Others had no such teams at all. A few of their leaders had prepared detailed roadmaps. Most had prepared only press releases. Yet the announcements arrived with the rhythm of a chain letter, each one validating the last, each one slightly safer to publish because the one before it had been published first. Within twelve months, the word artificial intelligence had appeared in the quarterly filings of hundreds of companies that had no obvious business in it, from car washes to pharmaceutical distributors. Not one of those executives, when asked privately, could have explained exactly what their new strategy would do for customers in the next two quarters. But they all knew one thing with perfect certainty: they did not want to be the last company on earth without an AI story.

This is the bandwagon effect in its purest form, and it is arguably the most powerful and least understood force in business psychology. It explains why entire industries move together, why competitors launch identical products in the same quarter, why analysts upgrade stocks they secretly doubt, and why investors pile into assets they privately consider overpriced. It is the reason that strategic originality is so rare and so valuable. And it is the reason that most of the money lost in markets is not lost by people who made bad bets alone. It is lost by people who made the same bad bet together, at the same time, for the same reason, reassured by the comforting fiction that a crowd cannot be wrong. The bandwagon effect deserves a closer look, because once you understand it, you begin to see it everywhere, in every earnings call, every industry conference, every capital allocation decision, and every market cycle. And once you see it, you can never unsee it.

A Shortcut Older Than Money

The roots of the bandwagon effect lie far deeper than any financial system. Human beings are a social species, and we owe our survival to our ability to read one another and move as one. When our distant ancestors heard a rustle in the grass, the one who paused to verify whether the danger was real did not always live to correct the record. The one who ran with the group, whatever the group was running from, usually did. Copying the behavior of the majority was, for most of our evolutionary history, the safest possible strategy, because being part of a group meant protection, and being left behind meant exposure. The modern brain inherited that algorithm intact. When we are uncertain, we do not look inward for the answer. We look at the people around us.

Psychologists have spent the better part of a century demonstrating how powerful this impulse remains. In the early 1950s, the psychologist Solomon Asch asked participants to complete what appeared to be a trivial visual task, matching the length of a line to one of three comparison lines. The answer was obvious. Yet when Asch placed each participant in a room with several actors who all confidently chose the wrong line, roughly one in three participants gave the wrong answer too, conforming to the group even though their own eyes told them otherwise. They did not conform because they were stupid. They conformed because they were human. The social cost of disagreeing with a unanimous room felt heavier than the cost of being wrong. Decades later, in experiments on financial decision-making, researchers found the same pattern reasserting itself: when people were told that other investors had chosen a particular stock, they became more willing to buy it themselves, regardless of any fundamental information.

This is what Robert Cialdini, the social psychologist who made the principle famous, calls social proof. When we are unsure what to do, we assume that the people around us have information we lack, and we follow them as a mental shortcut. The shortcut usually serves us well. In a restaurant we do not know, we choose the crowded one. In a strange city, we walk where the pedestrians walk. But the same shortcut that works for finding a good restaurant becomes a trap when applied to the complex, uncertain judgments that drive business and markets, because in those domains the crowd is frequently just as uninformed as we are, and the crowd’s confidence is not evidence of knowledge. It is evidence only that the crowd is confident.

Why the Safe Choice Is Dangerous

Inside corporations, the bandwagon effect does not announce itself. It operates through the quietest of channels, through the fear of being the dissenting voice in a room full of nodding heads. Consider the decision to acquire a competitor, launch into a hot market, or adopt a technology that every peer company has already embraced. The executive who argues against the crowd faces a terrifying asymmetry of outcomes. If she goes along with the crowd and the decision fails, she is one of many, and her career absorbs the blow with the rest of the group. If she goes against the crowd and she is right, she may receive quiet credit years later, if anyone remembers. But if she goes against the crowd and the crowd turns out to be right, she has made a very public, very personal mistake. The mathematician and economist John Maynard Keynes captured this asymmetry in a famous observation about the management of money, noting that a conventional decision that fails is more forgivable than an unconventional decision that fails. It is better for reputations to fail conventionally than to succeed unconventionally, because the crowd grants its members a collective alibi. No one wants to be the only person who missed a bandwagon, and nearly everyone would rather be wrong in company than right alone.

The result is a phenomenon that sociologists call mimetic isomorphism, the tendency of organizations to imitate the structure, strategy, and behavior of other organizations in their field, especially when the environment is uncertain. When no one knows the correct answer, companies copy the organization that appears most successful or most legitimate, and then others copy that copy. The pattern has been documented across industries for decades. When one airline introduced a loyalty program, the others followed within years. When one bank introduced a particular fee structure, its competitors mirrored it. When one tech company announced a pivot, a cascade of similar announcements followed, often within days. The imitation is rarely the product of conscious copying. It is the product of boards asking the same question, what is everyone else doing, and receiving the same answer from the same consultants, the same conferences, the same investment banks, and the same business press.

A History Written in Lockstep

The historical record is littered with bandwagons that ended badly, and the pattern is so consistent that it almost functions as a law of financial history. In the 1840s, British investors, dazzled by the early success of the railways, poured capital into hundreds of speculative railway projects, many of which connected places of no economic significance. The frenzy collapsed in 1847, and the losses were enormous, yet for a time every project justified itself simply because other projects existed. A century later, in the late 1960s, American executives decided that conglomeration was the future, and companies in unrelated businesses merged in a wave of what observers called the conglomerate boom. Each deal validated the next, until the wave broke and the same conglomerates, trade at premiums during the mania, fell into disfavor and were dismantled. In the late 1990s, the dot-com boom produced the most literal bandwagon in modern memory, when adding a dot com suffix to a company’s name could lift its stock price, and thousands of businesses reorganized themselves around internet strategies they barely understood. When the tide went out, most of them disappeared with it.

More recently, the pattern has repeated with the precision of a metronome. In the space of a few years, corporate boards decided simultaneously that blockchain was indispensable, then that every company needed a metaverse strategy, then that every company needed to become a lender or a payments platform, and then that every company needed an AI transformation. Each of these movements had real substance beneath the surface, and a few companies built durable value from each of them. But the bandwagon effect ensured that the majority of participants joined not because they had independently concluded the opportunity was right for their business, but because their peers had concluded it first. The tell was always the same. The companies that truly understood the technology rarely announced it loudly, because they were too busy building it. The loudest announcements came from companies with the least to show, because for them the announcement was the strategy.

When the Crowd Does Not Know Where It Is Going

The deeper problem with the bandwagon effect is that the crowd is often not following anyone. It is following itself. Each participant believes that the others have information they lack, and so everyone moves on the basis of information that no one actually possesses. Economists describe this as an information cascade. When the first mover makes a choice, the second mover reads it as a signal of hidden knowledge and follows. The third mover then sees two movers and follows with still more confidence. Within a handful of steps, the cascade is self-sustaining, and individuals are making decisions based on the decisions of people who were themselves making decisions based on the decisions of others. The original information, whatever it was, has long since been diluted to nothing, but the momentum continues, because at every stage the rational thing to do, from the individual’s point of view, is to follow the crowd.

This dynamic explains some of the most puzzling episodes in business history. It explains why banks kept lending to each other in the months before the 2008 financial crisis, each institution reassured that the others could not all be wrong. It explains why analysts maintained buy ratings on collapsing stocks, unwilling to break from a consensus that was comforting precisely because it was shared. It explains why institutional investors, who are paid to think independently, so often behave identically, hugging the same benchmark, buying the same index constituents, and rotating in the same directions at the same time. The modern fund manager’s truest fear is not losing money. It is losing money while everyone else is making it, because that is the kind of loss that ends careers. The fear of relative underperformance is so powerful that it regularly overrides the fear of absolute loss, and this is the bandwagon effect operating at the heart of the financial system.

For investors, the implications are profound. The bandwagon effect means that the market price of a popular company reflects not just its underlying value but also the accumulated weight of all the people who bought it because other people bought it. The more popular a strategy becomes, the more it attracts money for no better reason than that it is popular, and the further price drifts from the fundamentals that are supposed to justify it. This is why the most crowded trades in history have so often produced the most devastating losses. When the momentum breaks, it breaks for everyone at once, because everyone is holding for the same reason, and there is no bedrock of independent conviction beneath the price. The crowd that moves together discovers, in the moment of crisis, that it cannot be a crowd of sellers at the same time. Liquidity, the air that the market breathes, disappears exactly when everyone needs it most.

The Copycat’s Downfall

The bandwagon effect does not merely distort prices. It actively destroys value in the companies that fall under its sway, because imitation is a strategy with a built-in ceiling. A company that copies the successful moves of its competitors is, by definition, entering markets that have already been claimed, positioning itself where others are already positioned, and competing on ground that incumbents chose for a reason. Copycat competition is a race to compress margins, because when every firm offers the same product to the same customers, the only remaining differentiators are price and distribution, and both favor the largest, most established players. The imitator enters late, pays full price for whatever it acquires, and usually leaves the field having transferred wealth to the companies it copied, who have used the crowd’s attention to solidify their own positions.

The history of competitive strategy is, in large part, a history of companies that lost precisely because they imitated. The discount retailers that copied their way into markets and found themselves squeezed out by the originals. The software companies that raced to clone a successful product and discovered that the original had already captured the switching costs and the network effects. The banks that followed their rivals into every new lending fad, from emerging markets to subprime mortgages, and found themselves holding the same deteriorating assets when the music stopped. The pattern is so reliable that some investors have built entire careers on the opposite observation, that the most valuable businesses are almost never the ones that imitate, and that the companies that generate extraordinary returns are almost always doing something their peers are not yet doing, usually something their peers are actively mocking.

This is why the bandwagon effect is such a useful lens for evaluating management quality. When a leadership team announces a strategy, the investor’s first question should not be whether the strategy is plausible. It should be whether the strategy is original. A company that consistently articulates an independent point of view about its industry, that can explain why it is choosing not to do what everyone else is doing, is demonstrating a quality that is worth more than any single strategic bet. A company that can only justify its decisions by reference to what its peers are doing is signaling that it has outsourced its thinking, and companies that outsource their thinking eventually outsource their margins.

The Brakes on the Wagon

The bandwagon effect is powerful, but it is not inescapable, and understanding its mechanics is the first step toward resisting it. The individuals and organizations that consistently beat the crowd share a recognizable set of habits. They rely on primary information rather than secondary signals, which is to say they go and look at the ground themselves instead of watching where others are walking. They build explicit mechanisms for dissent, creating rooms where the minority view is not just tolerated but actively solicited, because they know that the majority view in any organization is the accumulated product of past bandwagons. And they make a practice of examining the cases where the crowd was wrong, not to feel smug but to calibrate, because a mind that has studied the pattern of group error is far less likely to be captured by it.

There is also a humbler, more human answer. The philosopher and investor Warren Buffett once observed that you are neither right nor wrong because the crowd disagrees with you. You are right because your data and your reasoning are right. The sentence sounds almost too simple to be useful, but it captures the essential discipline. The crowd’s opinion is information about the crowd, not about the world. Its confidence tells you something about group dynamics, about fear, about the power of momentum, but it tells you nothing about whether an asset is cheap or a strategy is sound. Separating those two questions, what everyone else believes, and what is actually true, is the whole art. Every great investment and every great business strategy has required the ability to hold the two apart and act on the second.

None of this means the crowd is always wrong. The bandwagon effect often carries people toward genuinely valuable discoveries, which is exactly why it is so dangerous. The difficulty is that the crowd’s verdict contains no marker of whether it is justified. The same mechanism that carried investors into the early internet, where fortunes were made, carried them into the late internet bubble, where fortunes were lost. The mechanism does not care which direction the wagon is rolling. It simply rolls, and it rewards those who understand that boarding a moving wagon is not the same as knowing where it is going.

Walking the Other Way

The bandwagon effect will keep operating long after this article is read, because it is not a bug in human psychology. It is the very system that made us social creatures in the first place. The instinct to follow is ancient, and in most of life it serves us beautifully. The task for those who wish to think clearly about business and markets is not to amputate that instinct but to know precisely when to suspend it. The moments that matter are the ones where the stakes are high, the information is genuinely uncertain, and the crowd’s conviction is loudest. Those are the moments when the shortcut fails, when the crowd’s confidence is at its maximum and its actual knowledge is at its minimum, and those are precisely the moments when independent analysis pays for itself many times over.

The next time an entire industry announces the same strategy in the same quarter, or an asset’s price rises for no reason anyone can articulate, or a room full of experienced executives nods in unanimous agreement, it is worth pausing to remember the line that formed itself on that January morning in 2023. Somewhere in that line were a few companies that genuinely understood the technology, and hundreds that did not. The market would sort them out eventually, as it always does, but it would sort them out at the expense of the imitators, who paid the price of admission for a ride they never understood. The bandwagon is comfortable, it is warm, and it is crowded. That is precisely why it is the most expensive seat in business.