IPO Investing: What Retail Investors Need to Know

If you've been anywhere near financial news today, you've probably heard about SpaceX hitting the Nasdaq at a $1.75 trillion valuation — the largest U.S. IPO in history. Your group chat is buzzing, your coworker is refreshing their brokerage app, and suddenly you're wondering: should I get in on this?

I get it. IPOs feel like a chance to get in early on the next big thing. And sometimes they are. But before you move money around, let's talk about what IPO investing actually looks like for everyday investors — the good, the bad, and the parts nobody mentions until it's too late.

What Is an IPO, Really?

An initial public offering is when a private company sells shares to the public for the first time. Before the IPO, only insiders, venture capitalists, and select institutional investors own pieces of the company. After it? Anyone with a brokerage account can buy in.

Companies go public to raise capital, give early investors a way to cash out, or both. The company sets a share price with help from investment banks (called underwriters), and then trading begins on an exchange like the Nasdaq or NYSE.

Here's the thing most people miss: by the time a company IPOs, a lot of the growth has already happened. SpaceX was valued at around $350 billion in private markets just two years ago. At $135 per share and a $1.75 trillion valuation, early investors have already captured enormous gains. You're not getting in on the ground floor — you're getting in on the penthouse.

That doesn't mean there's no upside left. It just means you should go in with realistic expectations.

What the Data Actually Says About IPO Returns

This is where things get uncomfortable. The hype around IPOs rarely matches the math.

Dimensional Fund Advisors studied more than 6,000 U.S. IPOs from 1991 to 2018 and found that newly public companies generally underperformed stocks of similar size. On average, IPOs underperformed comparable stocks by 5.2% in the first year. During the 2000-2017 stretch, that gap widened to 11.2%.

It gets worse. Research from Truist found an average first-year drawdown of 55% among 30 high-profile tech IPOs since 2012, with only 43% showing positive returns six months after their debut. That means more than half of buzzy tech IPOs were underwater within six months.

Why? A few reasons. IPO pricing often reflects best-case scenarios and peak enthusiasm. Once that initial excitement fades — and it almost always does — the stock has to justify its valuation with actual earnings. Many can't, at least not right away.

The Retail Investor Disadvantage

Here's something that doesn't get enough attention: the IPO game is structurally tilted toward institutional investors.

In a typical IPO, institutional investors — hedge funds, mutual funds, pension funds — get roughly 90% of the shares at the offering price. Retail investors get the remaining scraps. By the time you can actually buy shares on the open market, the price has often already jumped (or fallen) significantly from the IPO price.

SpaceX is actually unusual here. The company earmarked about 30% of its shares for retail investors — three times the typical allocation, according to CNBC. Brokerages like Fidelity, Schwab, and Robinhood were named as distribution partners, with some offering access to accounts with as little as $2,000. That's genuinely more accessible than most IPOs.

But accessibility doesn't equal safety. Even with better access, you're still buying a single stock at a price set during peak hype, with limited financial history to evaluate.

The "I'll Just Wait for the Index Fund" Strategy

Here's something smart that a lot of investors overlook: if a company is big enough and successful enough, it'll eventually land in the index funds you probably already own.

The S&P 500 index committee has already signaled that SpaceX won't be added to the index for at least a year after its IPO. The Nasdaq-100, however, could include it within 15 trading days under recently updated rules. And the Russell 1000 may add it within five trading days.

So if you own a total stock market ETF like VTI, or a Nasdaq-100 fund like QQQ, you'll likely get SpaceX exposure automatically — without paying a premium driven by IPO-day excitement, and without concentrating your portfolio in a single name. You get the upside of owning great companies without the downside of betting your savings on one of them.

This is the approach I'd recommend for most people reading this. It's boring. It's unglamorous. And historically, it works far better than chasing IPOs.

If You Still Want to Buy an IPO: Ground Rules

Look, I'm not going to pretend nobody ever makes money on an IPO. Some people do, and if you want to try, here's how to be smart about it.

Read the Prospectus (Yes, Actually Read It)

Every company going public files an S-1 prospectus with the SEC. It's long and dense, but it contains the only verified financial data you'll have. Look for revenue trends, profitability (or lack thereof), debt levels, and how the company plans to use the money it's raising. If the company isn't profitable — SpaceX, for instance, reported that losses from its space division and AI business offset Starlink profits — that's not automatically a dealbreaker, but you should know it going in.

Set a Position Size You Can Afford to Lose

A good rule: never put more than 5% of your total portfolio into any single stock, and especially not an IPO. If you have a $50,000 portfolio, that's a maximum of $2,500. This isn't pessimism — it's portfolio math. Single stocks carry dramatically more risk than diversified funds, and IPOs carry more risk than established stocks.

Don't Buy on Day One Emotion

IPO day is pure chaos. Prices swing wildly as millions of new shares find their footing. If you didn't get shares at the offering price, consider waiting days or even weeks for the dust to settle. Many IPOs see their biggest drops in the first 30 to 90 days as the initial hype cycle fades and lockup expirations allow insiders to sell.

Have an Exit Plan Before You Enter

Decide in advance: at what price would you sell to take profits? At what price would you cut losses? Write these numbers down. IPO stocks trigger powerful emotions — FOMO on the way up, denial on the way down. A plan made with a clear head is worth more than a gut feeling made in the moment.

The Lockup Period Trap

One thing that catches new IPO investors off guard is the lockup period. After a company goes public, early investors and employees typically can't sell their shares for 90 to 180 days. Once that lockup expires, a flood of new shares can hit the market, driving the price down.

This is a predictable event, yet it surprises people every time. If you're holding an IPO stock, mark the lockup expiration on your calendar and be prepared for turbulence.

The Bottom Line

IPOs are exciting. They're headline-grabbing, conversation-starting, FOMO-inducing events. And that's exactly why they're dangerous for your portfolio.

The data is clear: most IPOs underperform the broader market in their first year. Retail investors face structural disadvantages in getting shares at favorable prices. And the emotional intensity of IPO day is precisely the wrong environment for making good financial decisions.

If you're a long-term investor building wealth through index funds and diversified portfolios, you don't need to chase IPOs. The great companies will come to you — through your index funds, on a timeline that favors patience over hype.

And if you do decide to invest in an IPO? Keep the position small, do your homework, and have a plan. The best investment decisions are the ones that feel a little boring. That's usually a sign you're thinking clearly.