The IPO (Initial Public Offering) market in 2026 is booming. There have been 238 IPOs on the US stock market so far this year as of September 6, with global issuance rising 43% year over year in the first quarter to $256.8 billion. SpaceX went public in June 2026, becoming the biggest IPO in history at a $1.77 trillion valuation, raising roughly $75 billion. But beneath the champagne toasts and opening bell ceremonies lies a psychological trap that turns rational investors into cheerleaders for mediocrity. Here's how the scam works, and it's perfectly legal. A company goes public. You buy shares, maybe at $50 each. Within months, the stock tanks to $20. Traditional economic theory says you should cut your losses, reassess, maybe move your money to better-performing alternatives in the same sector. But that's not what happens. Instead, you double down. You defend the company on social media. You dismiss critics. You tell yourself, and anyone who will listen, that the market just doesn't understand the vision yet. This phenomenon has a name in behavioral economics: the sunk cost fallacy. Investors hold onto declining stocks hoping they will rebound to the original purchase price, rather than cutting losses and reallocating resources more effectively. The psychological weight assigned to incurring losses exceeds those attached to positive gains, creating asymmetric value in decision-making processes. Research shows investors feel the pain of a loss more than twice as strongly as they feel the enjoyment of making a profit. Once money is involved, people naturally defend their decisions, filtering information to support existing beliefs while dismissing signals that contradict them. The IPO structure amplifies this trap perfectly. During the typical 180-day lockup period, early investors and insiders cannot sell their shares. When that lockup expires, additional supply floods the market, often triggering price drops. But by then, retail investors who bought at the IPO price or during the initial pop have become emotionally attached. They've already invested substantial time researching the company, money buying the shares, and social capital defending their thesis to friends and family. Admitting the investment was a mistake feels like admitting personal failure. Confirmation bias kicks in hard. Investors seek out information that confirms they were right, ignore anything suggesting otherwise, and dismiss those who disagree with them. In 2026, this bias is easily reinforced by social media and financial influencers. Following only people who validate your investment thesis is one of the most effective ways to destroy a portfolio, yet it's exactly what losing investors do. The Reddit forum WallStreetBets exemplifies this dynamic, where communities rally around stocks like GameStop and AMC Entertainment with near-religious fervor, dismissing fundamental analysis as irrelevant. For companies, this creates a perverse incentive. Going public doesn't just raise capital; it creates an army of unpaid promoters who have a financial stake in defending the company's reputation, even when performance is abysmal. Every shareholder becomes a potential PR agent. Bad quarterly results? The investors will explain them away. Product failures? Just temporary setbacks. Exodus of key executives? Necessary pruning. The more the stock falls, the more desperately shareholders need to believe in the turnaround, because acknowledging reality means accepting painful losses. Recent data shows this isn't theoretical. Of the 25 firms that listed on the mainboard in India since September 2024, 15 are now trading below their issue price, with 10 of them down by 10% or more. Companies like Western Carriers, Deepak Builders & Engineers India, and Baazar Style Retail have all lost over 20% of their value since going public. Yet browse investor forums and you'll find shareholders insisting these are buying opportunities, that the market is irrational, that vindication is just around the corner. One unnamed IPO performer saw its shares drop nearly 75% from its $23.50 IPO price as of August 2026, yet dedicated holders remain convinced of recovery. The phenomenon extends beyond retail investors. In April 2026, BP shareholders delivered a protest vote at the annual meeting, with Chairman Albert Manifold receiving just under 82% support for his election, a significant rebuke when board members typically secure approval rates near 100%. Yet Norway's $2.2 trillion sovereign wealth fund was among investors that supported Manifold's election, demonstrating how institutional investors also defend positions despite poor performance to avoid crystallizing losses. Is it a scam? Not in the legal sense. But it's a structural feature of public markets that benefits issuers at the expense of later-stage investors. Companies and early investors get liquidity. Retail investors get bags to hold and cognitive biases that make them reluctant to admit mistakes. The market calls this price discovery. Behavioral economists call it predictable irrationality.