Not every fast-growing company belongs in a portfolio. Here’s how to tell the difference.
In Part 1, we said that growth investing is a specific discipline — not just buying companies with exciting stories, but finding businesses that have actually delivered consistent, measurable growth over years. We also said that growth stocks carry more risk than value stocks because you’re paying for the future, and the future has to show up.
That’s why the approach I use doesn’t just ask “is this company growing?” It runs every candidate through six hard gates. Pass all six, and the stock earns a spot on the candidate list. Fail any one, and it’s out — no averaging, no partial credit.
This post walks through all six gates.
Why Gates Instead of Scores?
A lot of screening tools assign points and rank companies. You might see something like “8 out of 10 criteria met.” That sounds rigorous, but it has a real problem: a company could score perfectly on five criteria and have terrible debt — and still make the cut.
Gates don’t work that way. A gate is pass or fail. Either the company clears the bar, or it doesn’t advance. Six gates means six separate failure modes, any one of which disqualifies the stock entirely.
The reason for this strictness: growth investing only works if the growth is real, durable, and not funded by dangerous levels of borrowed money. If a company fails even one of these tests, that failure is usually a signal that the growth story is fragile — or that the company isn’t actually a growth stock at all.
Gates 1 and 2: Revenue Must Grow at the Hurdle Rate — Both Short and Long
Revenue is the total money a company takes in from selling its products or services. It’s the top line — everything starts here.
CAGR stands for Compound Annual Growth Rate — the average annual growth rate over a period of time. It smooths out good years and bad years to show you the underlying pace. If a company’s revenue grew from $100 million to $161 million over five years, the CAGR is 10% — because 10% compounded for five years turns $100M into $161M.
Gate 1 asks: has revenue grown at or above the hurdle rate over the past five years?
Gate 2 asks the same question for the past ten years.
The hurdle rate is the minimum growth rate a stock must achieve to qualify as a genuine growth investment. It’s calculated as the current 10-year Treasury yield (the return you can get risk-free from US government bonds) plus the implied equity risk premium (the extra return investors demand for owning stocks instead of bonds). Together, these set the minimum bar: a company must grow faster than you could earn by simply buying US Treasuries and accepting average stock market risk.
Why two timeframes? Five years catches recent momentum. Ten years tests staying power. A company that grew fast for three years and then stalled won’t pass both gates. And a company that has grown steadily for a decade through multiple economic cycles is demonstrating something much more reliable than a recent hot streak.
If a company fails Gate 1 or Gate 2, it stops here. It isn’t a growth stock — it’s a company that used to be one, or one that only looks like it in a short time window.
One additional thing we look for beyond the minimum requirement: we prefer the 5-year CAGR to be higher than the 10-year CAGR. If a company’s revenue grew at 8% over ten years but 14% over the last five, that’s a business that is accelerating — the growth itself is growing. That’s a much stronger signal than a company running at the same pace it always has, or slowing down.
Gates 3 and 4: Net Income Must Also Grow at the Hurdle Rate
Revenue growth alone isn’t enough. A company can grow revenue by cutting prices, flooding the market with product, or acquiring other businesses. None of those are necessarily signs of a healthy, compounding business. The test is whether the bottom line is growing too.
Net income is what’s left after subtracting all expenses — cost of goods, salaries, taxes, interest payments — from revenue. It’s the profit the business actually earned.
Gate 3: net income CAGR over five years must be at or above the hurdle rate.
Gate 4: net income CAGR over ten years must be at or above the hurdle rate.
When revenue and net income grow together at the hurdle rate or faster, you’re looking at a business that is:
- Selling more
- Keeping more of each dollar it sells
- Doing it consistently across cycles
That’s the pattern genuine growth stocks show. Revenue-only growth with flat or shrinking earnings is a warning sign, not a buying signal.
The same preference applies here: we want the 5-year net income CAGR to be higher than the 10-year. A company whose earnings are accelerating — growing faster in recent years than over the full decade — is demonstrating that its business model is gaining leverage, not losing it. That’s exactly the kind of momentum a growth investor wants to be behind.
Gate 5: Debt-to-Equity Below 1.0
Growth costs money. Companies that are expanding need capital — to hire people, build infrastructure, develop products, enter new markets. There are two ways to fund that: equity (money raised from shareholders) and debt (money borrowed from lenders).
The Debt-to-Equity ratio — often written D/E — compares the total debt a company carries to the total equity shareholders own. A D/E of 0.50 means the company has borrowed 50 cents for every dollar of equity. A D/E of 1.5 means it has borrowed $1.50 for every dollar of equity.
Gate 5 sets a hard limit: D/E must be below 1.0.
Here’s why debt matters so much for growth stocks specifically. A growth company is already asking investors to accept uncertainty about the future. When you add significant debt to that picture, you add a second layer of risk: the lender’s claim on the company’s cash comes before the shareholder’s claim. If the growth doesn’t materialize, a heavily indebted company can find itself in financial trouble. Growth funded by debt is fragile growth.
A company with D/E below 1.0 has a conservatively financed balance sheet. It can absorb setbacks without existential threat. That’s the kind of company whose growth story can actually run for years.
A D/E ratio of exactly 1.0 means shareholders and lenders each own an equal claim on the business — shareholders own 50%, lenders own 50%. We want to invest in growth stocks where the shareholders own at least half of the company. A D/E above 1.0 means the lenders own more than the shareholders do — and that’s not a growth stock we want to own.
Gate 6: No Negative Earnings in the Last Five Years
A genuine growth stock should have delivered consistent profitability. Gate 6 looks at the last five years — twenty quarters — and asks: did the company report negative earnings (a net loss) in any single quarter?
If yes, the company fails this gate.
This test might seem harsh. Companies go through hard stretches. But a growth stock that has posted a loss somewhere in the last five years has already shown you that its growth trajectory is not smooth. Maybe competition hit it hard. Maybe a product failed. Maybe management made a significant mistake. Whatever the reason, a loss quarter is a crack in the foundation.
The goal is companies that have been consistently profitable throughout a full economic cycle — including the pressures and disruptions of the recent five years. That’s a high bar. But it’s exactly the kind of track record that supports the thesis that the company will keep compounding going forward.
The Valuation Check: Trailing P/E
After a company passes all six gates, there is one more factor to consider before it makes the candidate list: is the stock trading at a reasonable price?
The trailing P/E ratio — Price-to-Earnings — divides the current stock price by the company’s earnings per share over the last twelve months. If a stock is trading at $100 and earned $5 per share over the past year, its trailing P/E is 20.
The check compares the stock’s trailing P/E to the S&P 500’s long-run historical average P/E. If the stock is trading at or below that historical average, it clears this check.
This is not a gate in the same way the six growth criteria are. It’s a valuation guardrail. The six gates confirm the quality and durability of the growth. The P/E check ensures we aren’t paying so much for that growth that we’ve eliminated any possibility of a reasonable return.
A company that passes all six growth gates but trades at 80 times earnings isn’t cheap — it’s expensive. The P/E check catches that case and keeps it off the candidate list until the price becomes more reasonable.
How These Gates Work Together
Let’s walk through what each gate is defending against:
| Gate | What it screens out |
|---|---|
| Revenue CAGR 5yr | Short-term growth with no staying power |
| Revenue CAGR 10yr | Companies that grew once and stopped |
| NI CAGR 5yr | Revenue growth that isn’t profitable |
| NI CAGR 10yr | Profit growth that depends on temporary conditions |
| D/E < 1.0 | Growth funded by dangerous levels of debt |
| No negative EPS (20 qtrs) | Companies with unstable or inconsistent earnings |
The gates form a complete picture of a growth stock: growing revenue, growing profits, at both short and long time horizons, without dangerous debt, and without a streak of losses hiding somewhere in the recent history.
Companies that clear all six gates are rare. That’s the point. The entire population of publicly traded stocks narrows to a small, high-quality group. From that group, the trailing P/E check finds the ones priced reasonably enough to buy.
A Note to Luca and Lili
I want to explain something about why these gates are designed the way they are.
When you first look at a growth company — and I mean really look — you will often see a compelling story. The company is changing an industry. The product is genuinely different. People you know use it and love it. The CEO gives impressive interviews.
Stories like that are real. Some of those companies do go on to deliver extraordinary returns. But many don’t. And the ones that don’t fall short not because the story was wrong, but because the execution was flawed — the growth slowed, the debt mounted, a losing quarter arrived.
The six gates are designed to ask the numbers, not the story. By the time a company has grown its revenue and earnings at the hurdle rate for ten consecutive years, without going into debt to do it, without losing money in any quarter — that company has already proved most of what the story claims. The track record is there.
That is the company you want. Not the one with the most exciting pitch. The one that has already done the hard work — and keeps doing it.
— Papa
The One-Sentence Summary
The growth screen applies six sequential gates — five-year and ten-year revenue CAGR, five-year and ten-year net income CAGR, a Debt-to-Equity ratio below 1.0, and no negative earnings in the last twenty quarters — plus a trailing P/E valuation check, screening out every company that fails any single test before a stock earns a place on the candidate list.
That’s the complete Growth Investing screening process. This series continues — to follow along as new posts are published, visit the Growth Investing series page.