IPOs - Initial Public Offerings

An initial public offering is the process by which a private company sells shares to public investors for the first time. Understanding IPO mechanics — from the S-1 filing and roadshow to lock-up expiry and the long-run underperformance data — helps investors distinguish genuine opportunities from hype-driven allocations that overwhelmingly favor institutional buyers.

Level: IntermediatePart I - Market FoundationsPublished Deep Guide

The IPO Process: From S-1 Filing to First Trade

The IPO process begins with an S-1 registration filed with the SEC, which discloses financial history, risk factors, business model, and intended use of proceeds. Investment banks underwrite the offering, conducting a roadshow where management presents to institutional investors who submit indications of interest. The underwriters price the offering based on bookbuilding demand — setting a price that ideally generates strong first-day performance. This deliberate underpricing serves as a gift to institutional clients, who receive IPO allocations as a reward for their ongoing business with the underwriting banks.

First-day pops are structurally built into the system. Underwriters set IPO prices below where they expect the stock to clear in the market — a practice that benefits institutional allocatees at the expense of the company (which raises less capital than it could) and of retail investors who buy in the open market. The retail investor who buys at the market open on IPO day is purchasing from institutional allocatees taking profits, not from the company raising capital. This asymmetry explains why IPO day enthusiasm rarely translates into long-term outperformance for buyers who enter at the open.

The Long-Run IPO Underperformance Problem

Jay Ritter's decades of IPO research consistently document that IPOs underperform matched control firms by approximately 20-25% over the three to five years following issuance. The mechanism is clear: companies choose to go public when their own management believes the stock is fully or over-valued — they are selling at the best price they can get, which is rarely a bargain for public buyers. Additionally, the IPO structure concentrates information asymmetry against retail investors: insiders know the business intimately while public investors rely on marketing materials.

The lock-up expiry is one of the most reliable event-driven risk factors in IPO investing. Lock-up periods (typically 90-180 days post-IPO) restrict insiders, early investors, and employees from selling shares. When the lock-up expires, massive selling pressure often emerges from parties who have been waiting to liquidate. Stocks with high insider ownership and elevated post-IPO valuations face the greatest lock-up expiry pressure. Institutional investors model this event explicitly in IPO position sizing, often reducing or eliminating positions before the expiry date.

Direct Listings, SPACs, and How to Evaluate an IPO

Direct listings (Spotify 2018, Slack 2019, Coinbase 2021) bypass the traditional underwriting process — existing shares are sold directly on exchange without a new capital raise or underwriter price-setting. Price discovery happens in real time through order matching, producing a more accurate opening price. The advantage for public investors: no artificial underpricing, no lockup structure tied to underwriter relationships, and better price discovery. The limitation: no new capital is raised by the company, making direct listings unsuitable for companies that need IPO proceeds.

SPACs (Special Purpose Acquisition Companies) had a wave of popularity in 2020-2021, allowing companies to go public by merging with a blank-check company that had already raised capital. The SPAC structure has structural disadvantages for retail investors: sponsor promote (free shares to the SPAC sponsor dilute public holders), warrants dilution, and the de-SPAC lock-up that floods the market with selling. Post-2021 research confirms that the average SPAC significantly underperformed traditional IPOs and broad market indices after the de-SPAC merger completed.

Key Takeaways

- IPO underwriters deliberately underprice offerings — institutional allocatees capture the first-day pop, retail buyers at the open typically do not.
- Academic research documents 20-25% 3-5 year underperformance of IPOs vs. matched peers; the company is selling when it thinks conditions are best for the seller.
- Lock-up expiry (90-180 days post-IPO) creates predictable selling pressure — model this explicitly in position sizing.
- Direct listings produce better price discovery than traditional IPOs but do not raise new capital for the company.
- SPACs have significantly underperformed traditional IPOs on average due to sponsor dilution, warrant overhang, and de-SPAC lock-up selling.
- Always read the S-1 risk factors section — not just the business description — to understand what management itself discloses as material concerns.

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Concept FAQs

Should retail investors try to buy IPO shares at the offering price?

Retail investors rarely receive allocations of hot IPOs at the offering price — those go to institutional clients of the underwriting banks. When retail allocations are available through platforms like Robinhood or Fidelity, it is often because institutional demand is weak — a negative signal in itself. The better retail approach is to wait 3-6 months post-IPO for post-lockup price stability and to evaluate the business on fundamentals before committing capital.

What is the IPO lock-up period and why does it matter?

The lock-up period (typically 90-180 days) restricts insiders, early investors, and employees from selling after the IPO. When it expires, selling pressure often spikes as these parties, who have been unable to liquidate, finally can. Stocks with high insider ownership and rich post-IPO valuations are most vulnerable. Tracking lock-up expiry dates is standard practice for institutional IPO investors — it is a predictable, calendar-based risk that prudent investors account for before sizing positions.

How is a direct listing different from a traditional IPO?

In a direct listing, existing shareholders sell directly on the exchange with no underwriter setting an offering price. Price is determined by order-matching between buyers and sellers on the first day of trading. Direct listings produce better price discovery (no deliberate underpricing), no new capital is raised, and insiders typically face different lock-up structures. For investors, direct listings avoid the first-day pop dynamic but also lack the price stabilization mechanisms underwriters provide in traditional IPOs.

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