What I Look for Before Buying a Stock: My Personal 7-Point Checklist

Most investment mistakes don't happen because investors are unintelligent. They happen because investors skip steps — usually the uncomfortable, time-consuming steps that require admitting what you don't know.

I've developed a personal checklist of seven things that must be true before I commit capital to any stock. Not all seven need to be perfect — the goal isn't to find a flawless company, because flawless companies trade at prices that reflect their flawlessness. The goal is to ensure that my conviction is grounded in analysis, not in excitement. That I know what I'm buying, why I'm buying it, and what would have to go wrong for the investment to fail.

This is not an academic framework. It's what I actually use. Some of it you'll recognise from Benjamin Graham, Philip Fisher, and Warren Buffett. Some of it is mine. All of it has helped me avoid at least as many bad investments as it's helped me make good ones.

Box 1: I Can Explain the Business in Two Sentences

This is the first filter, and it disqualifies more potential investments than any other single test.

If I cannot explain — clearly, in two sentences — what a company does and how it makes money, I don't understand it well enough to own it. This is Buffett's circle of competence concept in its most practical form. "Risk comes from not knowing what you're doing," he has said. The two-sentence test is how I determine whether I know what I'm doing.

"Visa processes electronic payments between merchants and cardholders and earns a small fee on every transaction" — that's a two-sentence business description. "Apple designs consumer electronics software and hardware products and has built a services ecosystem that generates recurring high-margin revenue around its hardware" — that works. "This fintech company provides embedded payment infrastructure through API-first solutions for the B2B SME segment" — that does not pass.

Complex language is often a signal of either a genuinely complex business or a business whose owner doesn't understand it clearly. Either is a disqualifier at this stage. If the management team can't explain the business simply in their own shareholder letters, that's an additional red flag.

Box 2: The Competitive Advantage Is Identifiable and Durable

Understanding what a business does is not enough. I need to understand why that business will still be thriving in 10 years — specifically, what structural features of its competitive position make it difficult for others to replicate.

Pat Dorsey's framework from The Little Book That Builds Wealth is my reference: five moat types — intangible assets (brands, patents), switching costs, network effects, cost advantages, and efficient scale. A business might have one or two of these; rarely more. I need to be able to name the specific moat explicitly and explain why I believe it's durable.

"They're a well-known brand" is not sufficient. Revlon is a well-known brand. So is Blackberry. Brand moats are real only when the brand creates genuine pricing power, extraordinary customer loyalty, or a cultural position that competitors cannot buy.

Switching costs are often more durable than brands. A business whose products become embedded in its customers' operations — payroll software, accounting systems, supply chain management — benefits from the enormous friction of replacement even when a competitor offers a marginally better product. Customers simply don't switch.

If I can't identify a structural moat, the business might still be a fine company. But I won't pay a premium for future growth — and I certainly won't own it in a concentrated position.

Box 3: Management Is Aligned and Has Proven Capital Allocation Skills

Bad management can destroy a great business. Good management can improve an ordinary one. And the question of whether management is aligned with shareholders is answerable if you look in the right places.

I want to see significant insider ownership — ideally 5% or more of outstanding shares. This isn't a magic number; it's a signal that the people running the business think like owners, not hired hands. When a CEO owns $50 million worth of stock, they care about the long-term value of the business in a way that a CEO with a $2 million salary but no ownership doesn't.

More important than ownership, I look at capital allocation decisions. What has management done with free cash flow over the past five years? Have they made acquisitions that made sense at prices that were fair? Have they bought back shares when they were cheap? Have they funded the business organically at high returns? Or have they wasted cash on empire-building acquisitions, overpaid for growth, and diluted shareholders?

Philip Fisher argued in Common Stocks and Uncommon Profits that great management has three characteristics: a determination to grow the business over the long term, a willingness to talk honestly about problems as well as successes, and the ability to attract and retain talented people. The last two are particularly telling. Read the last five years of shareholder letters and earnings call transcripts. Does management acknowledge when things go wrong? Do they make specific commitments about future performance? Do they then keep them?

Box 4: Three Financial Tests Must Pass

Before I run a detailed valuation, I apply three quick financial filters to determine whether the business is worth further analysis. If it fails all three, I stop.

ROIC above 12-15% consistently. Return on Invested Capital measures how efficiently a business converts the capital invested in it into profit. A business consistently earning 15-20% ROIC is creating real value — it's earning meaningfully more than its cost of capital. A business earning 5-8% ROIC is barely covering its capital costs and creating little incremental value for shareholders. Mediocre ROIC tells you that the competitive advantage is either weak or absent. Check our guide on how to measure value creation for a full breakdown.

Free cash flow conversion above 80%. Free cash flow — net income minus the capital spending required to maintain and grow the business — should represent at least 80% of reported net income. When it's lower, it means the business is consuming substantial capital just to sustain itself. When it's higher, the accounting earnings are being confirmed by actual cash generation. Free cash flow is harder to manipulate than earnings, which is why I always check the relationship between the two.

Net Debt/EBITDA below 2.5x. Debt amplifies both gains and losses. A business with 5x leverage in a downturn can be forced into asset sales, equity issuances at terrible prices, or even default. I'm not categorically opposed to any debt — debt can be rational capital structure for businesses with very stable cash flows — but I want leverage to be manageable. 2.5x is my rough upper limit for a non-financial business. Below 1x is ideal.

Box 5: I Understand the Risks — and Accept Them

Every investment has risks. The dangerous investor is not the one who takes risks; it's the one who doesn't know what they are.

Before buying, I explicitly list the two or three things that could go genuinely, permanently wrong with this investment. Not "the stock could go down 20% in a recession" — that's a price risk, not a business risk. I mean: what could permanently impair the intrinsic value of the business?

For a pharmaceutical company, it might be the loss of a key patent. For a retailer, it might be Amazon encroachment. For a bank, it might be credit cycle exposure. For a media company, it might be the speed of cord-cutting. Having named these risks explicitly, I decide whether they're acceptable given the price I'm paying. If the risk is existential and the margin of safety is thin, I pass. If the risk is identifiable and manageable and the price provides a genuine buffer, I proceed.

Nassim Taleb's concept of avoiding "ruin" applies directly here. The investor who loses 50% needs a 100% return just to get back to even. The asymmetry of loss is brutal. Avoiding catastrophic outcomes — which is what risk analysis is actually for — matters more than finding the best possible outcome.

Box 6: The Price Provides a Margin of Safety

Benjamin Graham's margin of safety — buying at a significant discount to intrinsic value — is the box that protects you from all the mistakes you'll inevitably make in boxes 1 through 5.

Your two-sentence business description might miss something. Your moat assessment might be wrong. Management might have hidden flaws. The financials might have issues you didn't spot. Buying at a 25-30% discount to intrinsic value means that even if your analysis has meaningful errors, you can still earn a reasonable return — because you didn't pay full price for a perfect scenario.

I use a simplified intrinsic value estimate: normalised earnings multiplied by a multiple appropriate to the business's growth profile and moat strength, crosschecked against a rough discounted cash flow. I don't claim precision — intrinsic value estimates are inherently uncertain. What I'm looking for is not a specific number but a meaningful gap between price and value. If the stock is at $40 and my best estimate of fair value is $42, the margin of safety is essentially zero and I don't buy. If the stock is at $28 and my best estimate is $42, the 33% discount is meaningful and I proceed.

The Gingernomics 5-criteria checklist incorporates this pricing discipline into a structured format you can apply to any stock.

Box 7: I'm Comfortable Doing Nothing for Three Years

This is the temperament test, and it's one most checklists leave out.

Before I buy, I ask myself honestly: if this stock went nowhere for three years, or dropped 30% in the first year, would I be anxious every time I check the price? Would I lose sleep if the next quarterly earnings report is slightly below expectations? If the answer is yes, one of two things is wrong: the position is too large for my genuine conviction level, or the conviction is emotional rather than analytical.

The solution to both problems is the same. For a high-uncertainty position, I own less of it — say 2-3% of the portfolio rather than 8-10%. For a position where the conviction is not real, I don't buy at all. Mohnish Pabrai writes about the "punch card" approach: if you could only make 20 investments in your lifetime, how much care would you apply to each one? The positions you hold with genuine conviction are the ones you sleep through corrections

on. The others create noise and bad decisions.

This test also reinforces an important discipline: if I can't hold a stock for at least three years in my mind before I buy it, I probably shouldn't be buying it at all. Short-term thinking is the investor's enemy, not their friend.

The Checklist in Practice

These seven boxes together form a pre-flight checklist for every investment. They don't guarantee success — nothing in investing does. But they eliminate the most predictable errors: buying what you don't understand, overpaying for mediocre quality, trusting management you haven't examined, ignoring risks until they materialise, and overextending into positions your emotional architecture can't sustain.

Run your next stock idea through all seven boxes before you buy. If it clears them all, buy with conviction. If it fails any, either do more work until you're confident or pass and wait for a better opportunity. The best investors in history spent more time not investing than investing. Patience and discipline — enforced by a systematic process — are the competitive advantages available to every individual investor.

Start with the Gingernomics 5-criteria checklist and our beginner track to build out the analytical skills behind each of these boxes.

The content on Gingernomics is for educational and informational purposes only and does not constitute financial advice. Always do your own research and consult a licensed financial advisor before making any investment decisions. Past performance is not indicative of future results.