A private company that wants publicly traded shares has three main doors.
The classic route is the initial public offering, or IPO: the company creates new shares and sells them to investors, raising fresh money for itself, with investment banks managing the process. It's the oldest path and still the most common.
The second door is the direct listing. The company skips the fundraising and simply lets its existing shares start trading on an exchange. No new money is raised at first; early owners just gain the ability to sell.
The third is the SPAC merger. A SPAC — special purpose acquisition company — is a shell of cash that's already public. A private company merges into the shell and inherits its listing, going public through the side door.
Same destination, very different mechanics — and the mechanics shape who wins, who pays, and what the early trading looks like. Let's walk through each.
An IPO price isn't set by an auction on opening day. It's negotiated in advance through a process called bookbuilding.
The company hires investment banks — the underwriters — who first help set a preliminary price range. Then comes the roadshow: one or two weeks of executives pitching the company to institutional investors in meeting after meeting. Those institutions respond with indications of interest — how many shares they'd take, and at what price. The banks collect these into an order book.
The night before trading, company and banks set the final price based on that demand. Heavily oversubscribed book? Price at the top of the range or above it. Tepid interest? Price low, shrink the deal, or pull it entirely.
Here's the part that matters for you: allocation. Shares at the IPO price go overwhelmingly to the institutions in the book, plus favored clients. Ordinary investors mostly can't buy at the IPO price — they buy in the open market after trading starts, often at a very different number. Keep that in mind for what comes next.
IPOs are famous for the first-day pop — pricing at, say, $20 and closing day one at $27. Decades of research, notably Jay Ritter's long-running data on U.S. IPOs, show average first-day gains in the double digits over most modern periods, spiking higher in bubble years.
A pop makes great television, but consider what it means: the company sold for $20 shares that buyers valued at $27 within hours. That gap — money left on the table — went to the institutions with allocations, not the company. Underpricing is so persistent that researchers treat it as a feature: banks keep big clients happy with reliable pops, and companies accept it as the cost of a smooth debut.
Now flip to your side. Buying at the open means paying the popped price, not the IPO price — the famous first-day return happened to someone else. Chasing a hot debut at the open has historically been an expensive moment to fall in love with a stock.
Only a small slice of a company's shares — often 10 to 20% — actually trades after an IPO. Insiders, employees, and early investors hold the rest, and they've typically signed lockup agreements promising not to sell for a set period, usually 90 to 180 days.
Lockups keep the debut from being crushed by insiders cashing out on day one. But they create a known event: the expiration, when that mountain of shares becomes sellable. Stocks often come under pressure around expiry, as supply jumps and insiders, diversifying after years in one asset, do exactly what you'd expect.
It's not a law of physics — plenty of stocks shrug off expiration. But the lockup calendar belongs in your homework, and a tight float can exaggerate early moves in both directions, since small demand meets small supply. The stock you're watching at month two trades on a fraction of the shares that will exist at month twelve.
The direct listing suits a company that doesn't need cash but whose employees and early backers want liquidity. Existing shares list with no underwritten offering and usually no lockup, and the opening price comes from an auction on day one. But with no banks stabilizing the deal and no lockup dam, early trading can be a rougher ride. Only a handful of large companies have taken this path.
SPACs boomed in 2020 and 2021, then deflated just as spectacularly. A sponsor raises cash into a public shell, then hunts for a private company to merge with. The catch is the fee structure: sponsors typically receive around 20% of the shell's shares nearly free — the promote — and that dilution comes out of everyone else's slice. SPACs also let targets market rosy projections in ways traditional IPOs restrict.
The scoreboard has been unkind: study after study found post-merger SPAC returns badly trailing the market on average. Structure isn't destiny, but with SPACs, the structure starts you in a hole.
Here's the finding that anchors this chapter: on average, newly public companies have been disappointing investments. Ritter's data on thousands of U.S. IPOs found they underperformed comparable established stocks over the following three to five years — pop first, fade later. Small, unprofitable debuts fared worst; a minority of big winners carried the averages.
Why would that be? Companies choose to go public when conditions favor sellers — after great results, in hot markets, with polished narratives. You're buying at a moment picked by the seller for being a good moment to sell. Add the hype cycle, the lockup wave, and demanding starting prices, and the pattern makes sense.
None of this means avoid every new listing forever. Some of the market's greatest companies were once fresh IPOs. It means the debut deserves your patience, not your excitement. A year of trading gives you real earnings reports, a post-lockup shareholder base, and a price history you can actually study. The company will still be there. The pop, historically, was never yours anyway.
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