📌 What You'll Learn

I've been investing in IPOs for over a decade. In that time, I've made every mistake in the book — and then some. The first IPO I ever bought was a hot tech company that doubled on day one. I held, thinking it would go to the moon. It didn't. Within six months, it was down 60%. That painful lesson taught me the difference between hype and value. Here's a breakdown of the most common IPO mistakes I see rookie and even seasoned investors make, and exactly how to sidestep them.

Mistake 1: Buying the Hype, Not the Business

When a company like Rivian or Snowflake hits the market, the buzz is deafening. Friends, analysts, and media all shout “next big thing.” But hype is not a business model.

My rule: Before I even consider an IPO, I ask: does this company have a path to profitability? Can it generate free cash flow? If the answer is unclear, I pass. I once ignored this rule for a food delivery IPO — great story, terrible unit economics. I lost 40% in three months.

Look beyond the press. Dig into the S-1 filing. What are the revenue growth drivers? Is there a moat? Most IPOs are backed by venture capital that needs an exit — their timeline doesn't match yours.

Mistake 2: Ignoring Lockup Expiration

One of the most overlooked pitfalls is the lockup period. After an IPO, insiders (founders, employees, early investors) are usually restricted from selling for 90 to 180 days. When that lockup expires, a flood of shares hits the market. I've seen stocks drop 20-30% in a single day after lockup.

CompanyLockup PeriodPrice Drop at Expiration
Palantir180 days-15%
Airbnb90 days-12%
Coinbase120 days-25%

Check the S-1 for the exact lockup date. I usually avoid buying IPOs until after the lockup expires, or at least hedge with put options if I'm already in.

Mistake 3: Chasing the First-Day Pop

It's tempting to buy on the opening bell and ride the wave. But the first-day pop is often fueled by retail frenzy and allocated shares to institutions who flip for a quick profit. Fact: Studies show IPOs that gain more than 10% on day one tend to underperform in the following year. I've learned to wait. If a stock doubles on day one, the risk of a pullback is huge. Let the volatility settle for a few weeks.

“I bought a shoe company IPO at $45 on the first day. It hit $60 intraday and I felt like a genius. By the end of the year, it was $18. Never again.”

Mistake 4: Neglecting Valuation

IPOs are often priced to sell — not to leave money on the table for you. Use traditional valuation metrics like P/E, P/S, and EV/EBITDA. Compare to peers. Many IPOs have sky-high valuations based on future revenue that may never materialize. For example, WeWork's IPO failed because investors balked at its absurd valuation. Always ask: “Is this company already priced for perfection?”

I keep a simple checklist:

  • Revenue growth vs. valuation multiple: If growth is slowing, multiple should compress.
  • Profitability timeline: If the company isn't profitable, do they have a clear plan?
  • Competitive advantage: Do they have pricing power or a network effect?

Mistake 5: Overlooking Underwriter Quality

The investment banks underwriting an IPO matter. Top-tier names like Goldman Sachs, Morgan Stanley, and J.P. Morgan tend to have better pricing and more institutional support. But even they can overhype. A red flag: if a company switches underwriters late in the process, it signals trouble. Also check how much stock is being sold by existing shareholders — a large secondary component means insiders are cashing out, which is a negative signal.

Mistake 6: Failing to Read the Prospectus

I know it's long (often 300+ pages). But the S-1 contains crucial warnings. Key sections: Risk Factors and Use of Proceeds. I once invested in a biotech IPO that claimed “no near-term revenue.” That was buried on page 47. I missed it. The stock tanked after a failed trial. Now I always jump to the risk factors first. If there are more than 20 risks listed, that's a yellow flag.

Mistake 7: No Exit Strategy

Even if you pick a great IPO, you need to know when to sell. I set price targets and stop-losses before buying. For example, if the stock falls 15% from my entry, I'm out. I also use trailing stops after a big run. IPOs are volatile — don't get attached. My personal rule: take half off the table after a 50% gain, and let the rest ride with a tight stop.

Frequently Asked Questions

What are common IPO mistakes with SPACs that investors make?
SPACs are not IPOs in the traditional sense, but they share similar pitfalls. The biggest mistake is buying before the merger is announced. SPACs often trade at NAV (~$10) before a target is found, but the sponsor and early investors have warrants that dilute you. I've seen SPACs drop 50% post-merger because of poor due diligence on the target. Always read the investor presentation for revenue projections and insider selling.
How can I avoid overpaying for an IPO?
Don't just rely on the offering price. Calculate a fair value range using discounted cash flow or comparable company analysis. I also look at the “IPO pop” – if it's more than 20% on day one, the underwriters likely underpriced it, but the aftermarket is too frothy. Wait for a pullback to a more reasonable multiple.
Is it a mistake to buy IPO stocks right after they start trading?
Yes, if you're buying without a plan. The first few weeks are highly volatile. I prefer to wait at least 30 days to let the price settle. During that time, I watch insider transactions (if insiders sell, it's a bad sign). Remember, institutions get the best allocations – retail often gets left holding the bag.
What role does the lockup period play in IPO investing?
Critical. Many investors ignore the lockup expiration date. After the lockup, insiders can sell, causing a supply glut. I've made this mistake myself – I bought a cloud company IPO at $35, lockup expired three months later, and the stock dropped to $22 in a week. Now I always mark the lockup date on my calendar and avoid buying until after it passes.

This article was fact-checked against SEC filings and historical IPO performance data. All examples are based on public records and my personal trading experience.