If you're new to investing in 2026 and have just discovered value investing, the most common mistake is trying to learn 30 ratios at once. The job is actually simpler: ask four questions about any business before you consider owning a piece of it.
This post walks through each, with Apple and Coca-Cola as worked examples to show what the answers look like. You don't need a finance degree, you don't need to memorise formulas. You need to be able to answer four questions.
If you can't answer them about a business, don't own the stock.
Question 1: Will this business still be relevant in 10 years?
The single most important question. Warren Buffett built his career on businesses whose existence-in-10-years he could predict. Don't reach for businesses where the answer is uncertain.
Apple: probably yes. Smartphones and PCs are durable categories. Apple's brand and ecosystem make it a probable participant in 2036.
Coca-Cola: almost certainly yes. People have been drinking carbonated sugar water for 130+ years. The brand is one of the most recognised in the world.
A random crypto exchange in 2026: maybe, maybe not. The category is real but the specific company isn't durable.
A typical biotech with one drug in Phase 2 trials: probably not as currently configured.
If you can't confidently say "yes, this business will exist in 10 years," you're not value investing - you're speculating. There's nothing wrong with speculating; just don't confuse it with investing.
Question 2: Is the management trustworthy and competent?
The people running the business matter. Buffett spent decades looking for managers who treat shareholders like partners, not extractive employers.
Three things to check:
Capital allocation history: did the CEO buy back shares at smart prices (cheap), or at peak prices (expensive)? Apple's Tim Cook has been remarkably disciplined on buybacks. Many CEOs are not.
Compensation structure: is the CEO's pay tied to per-share metrics or absolute scale? Per-share is good (aligned with you); absolute scale incentivises empire-building (acquisitions to grow revenue regardless of price paid).
Letters to shareholders: are they candid, specific, and self-critical, or are they generic platitudes? Berkshire Hathaway's annual letters from Buffett are the gold standard. Many CEO letters are PR.
Apple: Cook has been broadly excellent on capital allocation. Buybacks at fair prices, gradual product expansion, no value-destroying acquisitions. Pass.
Coca-Cola: James Quincey, the current CEO, has been steady. The capital allocation has been slow and conservative. Pass.
You can find all this in 30 minutes per company by reading the last 3 annual letters and looking at the buyback timing in the cash flow statement.
Question 3: Is the price reasonable?
The third question. Not the first, but important.
The simplest version: what's the company's earnings yield? (Earnings yield = 1 / P/E)
- An earnings yield below 4% (P/E above 25) requires extreme business quality to justify
- An earnings yield between 5-8% (P/E 12-20) is "fair price" territory
- An earnings yield above 10% (P/E below 10) is "cheap" - verify quality first
Apple: P/E ~33, earnings yield ~3%. Stretched. Requires Apple's quality to be exceptional, which it is, but you're paying near top-of-the-range for it.
Coca-Cola: P/E ~27, earnings yield ~3.7%. Also stretched but closer to fair. Coca-Cola's stability + dividend supports the price.
The better version: owner-earnings yield (see our owner-earnings explainer). For most beginners, plain earnings yield is good enough as a starting point.
Question 4: How much could you lose if you're wrong?
The question almost no beginner asks, and the one experienced value investors care about most.
Three checks:
Balance-sheet resilience: does the company have enough cash to survive a bad year? Current ratio ≥ 2 (current assets / current liabilities) is the simple test. If current ratio < 1, the company has a liquidity-crisis-vulnerability you need to understand before owning.
Customer / supplier concentration: does any single customer account for >20% of revenue? Does any single supplier control a critical input? Concentration = fragility.
Regulatory exposure: is the business subject to a single regulatory regime that could change? Banks, healthcare, gaming companies have this risk by default; software companies less so.
Apple: balance sheet is fortress-level. Current ratio ~1, but $171B of cash and marketable securities offset the working-capital structure. Multiple regulatory exposures (EU antitrust, China, US tech regulation), each meaningful but not existential. Loss scenarios: 30-40% in a severe scenario where China revenue collapses or EU forces App Store changes. Recoverable.
Coca-Cola: current ratio ~1.1, but stable. Diversified globally. Loss scenarios: 20-30% in a major sugar tax / consumer-trend-against-sugar scenario over a decade. Recoverable.
Compare to a typical pre-revenue biotech: loss scenarios are 100% if the drug fails Phase 3. Not recoverable. Different risk profile entirely.
The simplest possible workflow
- Find a business you understand (Question 1)
- Look up the management's track record (Question 2)
- Check the earnings yield + owner-earnings yield (Question 3)
- Identify the worst-case loss scenarios (Question 4)
If three of the four are "yes / acceptable / strong," you have a defensible value-investing position. If two or fewer are positive, walk away.
How invest-like helps beginners
The four questions sound simple. They require time to investigate well. invest-like automates the data-gathering for the first three, so you can focus on the judgment calls:
- Question 1 (durability): each stock page shows the business model, segment revenue, and our durability pillar score (gross margin stability is the leading indicator).
- Question 2 (management): management pillar score on the radar chart, plus the insider trades page for buy/sell activity from corporate insiders.
- Question 3 (price): P/E, owner-earnings yield, DCF, reverse-DCF - all four computed and displayed on every stock page.
- Question 4 (loss scenarios): the Risk & Upside Evaluator generates plausible bear-case scenarios with the underlying ratios that drive them.
The first stock to try the workflow on: open /buffett/aapl/, /buffett/ko/, or any blue-chip you've heard of. Read the four pillar scores. Read the Buffett Brain verdict. Open the Boardroom to see four investor perspectives. Within 10 minutes you should be able to answer all four questions confidently.
What this is not
Value investing is not the only valid approach to investing. Index funds (S&P 500 ETFs, MSCI World ETFs) are an entirely different strategy and are appropriate for most beginners. If you want low-effort, low-risk, broadly-diversified exposure to the market, buy an index fund and stop reading investment posts. The math says index funds outperform 85%+ of actively-managed funds over 30-year periods.
Value investing is for the subset of investors who want to think about individual businesses, who have the time to read a 10-K, who want to understand exactly what they own. It is more work for potentially better returns. It is also more work for potentially worse returns if you do it badly. The trade-off is real.
The four questions are the irreducible minimum for thinking about an individual stock seriously. If you don't want to spend the time, buy the index. There is no shame in that.
Disclosure
Educational tool. The framework described is not investment advice. Past stock performance does not predict future returns. Apple and Coca-Cola are mentioned as analytical examples, not recommendations.
Author: Zaid Ghazal, founder of invest-like, Kiel, Germany. Not a registered investment adviser. Index funds (mentioned above) are an entirely separate strategy from value investing; both can be valid choices.