A single year's financials can be misleading. Earnings spike from one-time gains, margins compress during temporary disruptions, and debt ratios fluctuate with the capital cycle. That's why Buffett studies at least a decade of financial history before forming an opinion on a business.
SafetyMargin.io's Historical Fundamentals section gives you 25+ metrics charted across 10+ years. Here's how to read them.
Valuation Metrics
P/E Ratio
The price-to-earnings ratio tells you how many years of current earnings you're paying at today's price. Track it historically to understand what the market has typically been willing to pay for this company. A P/E well below its historical average may signal undervaluation — or deteriorating fundamentals. Always investigate why the P/E has changed.
Valuation Bands
This FastGraphs-style chart overlays the actual stock price against earnings-based value lines — one at 15× EPS (a conservative "fair value" benchmark) and one at the company's own historical average P/E × EPS. When the price line sits below the bands, the market is pricing in less than the company historically earns. When it's far above, you're paying a significant premium. The tooltip shows the exact discount or premium relative to the historical average P/E band.
NCAV / Price
Ben Graham's "net-net" metric — (Current Assets − Total Liabilities) ÷ Market Cap, shown as a percentage. Above 100% means the stock trades below its liquidation value, the deepest form of value investing. Most large-cap companies will show negative values because their total liabilities exceed current assets. This metric is primarily useful for screening small-cap, asset-heavy, or turnaround situations where deep value opportunities may exist.
The Core Growth Metrics
EPS (Earnings Per Share)
The single most important trend line. Look for:
- Consistent upward trajectory — the hallmark of a durable business. Occasional dips are fine if the long-term direction is clear.
- Stagnant or declining EPS — a warning that the business is losing competitive ground or facing structural headwinds.
- Wild volatility — cyclical businesses show this pattern. It's not necessarily bad, but it makes valuation harder and demands a wider margin of safety.
Revenue
Revenue growth that consistently outpaces inflation signals genuine demand expansion. But revenue alone isn't enough — a company can grow the top line while margins erode. Always pair revenue trends with margin analysis.
Free Cash Flow
FCF is what's left after the business pays all its bills and reinvests in itself. It's the actual cash available to reward shareholders. Compare FCF against EPS — if EPS grows but FCF doesn't, the company may be relying on accounting adjustments rather than real cash generation.
Profitability & Moat Metrics
ROIC (Return on Invested Capital)
A consistently high ROIC (above 15%) over a decade is one of the strongest signals of a competitive moat. If ROIC is trending downward, the moat may be eroding — competitors are catching up, or the company is investing in lower-return opportunities.
ROE (Return on Equity)
Similar to ROIC but affected by leverage. If ROE is high and stable while Debt/Equity is low and stable, that's genuine operational excellence. If ROE is high but Debt/Equity is rising, the returns are being manufactured with borrowed money.
Gross Margin
Pricing power shows up here. A company with stable or expanding gross margins over a decade can raise prices without losing customers — that's a moat. Declining gross margins often signal commoditization or increasing input costs the company can't pass through.
Balance Sheet Safety Metrics
Debt / Equity
Watch the direction, not just the level. A company that steadily reduces its Debt/Equity ratio over time is strengthening its balance sheet. A company where D/E is trending upward is becoming more leveraged — and more vulnerable to downturns.
Interest Coverage
This metric matters most during economic stress. A company with 15x coverage today can handle a significant earnings decline and still service its debt comfortably. Below 3x, even a modest downturn could create financial distress.
Net Debt / EBITDA
The trend is more important than any single reading. Negative values (more cash than debt) give a company enormous strategic flexibility — for acquisitions, buybacks, or simply surviving a recession without cutting the dividend.
Advanced Metrics
Owner Earnings vs. FCF
Buffett's preferred cash flow measure. Owner Earnings (Net Income + D&A minus Maintenance CapEx) is less punitive than standard FCF for companies investing heavily in growth. When Owner Earnings significantly exceeds FCF, the company is spending heavily on growth CapEx — check whether those investments are generating adequate returns via ROIIC.
ROIIC (Return on Incremental Invested Capital)
This answers the forward-looking question: what return is the company getting on the next dollar it invests? Consistently high ROIIC (above 10%) identifies true compounders. Declining ROIIC suggests the company is running out of high-return reinvestment opportunities.
SBC-Adjusted FCF
For technology companies, Stock-Based Compensation can be a massive hidden cost. If standard FCF is $10B but SBC-Adjusted FCF is only $6B, shareholders are being diluted by $4B annually. A persistent wide gap is a red flag for true cash generation.
Capital Allocation
How management deploys cash reveals their priorities: heavy buybacks suggest they believe the stock is undervalued, rising dividends signal confidence in sustained earnings, and aggressive CapEx indicates growth investment. Check the Buyback Score tab to see whether buybacks were done at good prices.
DuPont Analysis
ROE tells you the return, but DuPont Analysis tells you how that return is generated. It decomposes ROE into three multiplicative components:
- Net Profit Margin (green line) — what percentage of revenue becomes profit. Rising margins signal pricing power and operational discipline.
- Asset Turnover (blue line) — how efficiently the company uses its assets to generate revenue. Higher is better. Asset-light businesses naturally score higher here.
- Equity Multiplier (orange line) — the degree of financial leverage (Total Assets ÷ Equity). Higher means more debt-funded assets.
The ideal company drives ROE through high margins and asset efficiency, not leverage. If you see ROE rising primarily because the equity multiplier is increasing, that's a yellow flag — the company is borrowing its way to better returns. Compare the DuPont tab against the Debt/Equity tab for the full picture.
Dividend Safety & Growth
For income investors, a high yield means nothing if the dividend gets cut. This tab evaluates dividend sustainability through multiple lenses:
- DPS (Dividend Per Share) — the bars show the actual cash returned per share each year. Look for a steady upward staircase.
- Earnings Payout Ratio (blue line) — what percentage of net income goes to dividends. Below 50% is comfortable; above 75% leaves little room for error.
- FCF Payout Ratio (orange line) — a stricter test using free cash flow. A company can pay dividends from earnings on paper, but it needs actual cash to write the checks.
- Safety Score — a composite of payout ratios, FCF coverage, and dividend growth consistency. "Very Safe" (80+) means the dividend is well-covered and growing. "Unsafe" (below 40) means a cut may be coming.
- Consecutive Increases & CAGR — the streak of annual DPS increases and compound growth rates over 3, 5, and all available years.
The red dashed line at 100% payout marks the danger zone — the company is paying out more than it earns, funding dividends from debt or reserves.
Share Count / Dilution History
Buffett cares deeply about per-share metrics. A company can double its earnings, but if shares outstanding also double, each shareholder's slice of the pie hasn't grown. This tab tracks shares outstanding over time:
- Green bars indicate years where the share count decreased — buybacks exceeded dilution from stock-based compensation and option exercises.
- Red bars indicate years where shares increased — dilution from SBC, secondary offerings, or acquisitions using stock.
A persistent downward trend (all green) means management is rewarding existing shareholders. A persistent upward trend (all red) means your ownership is being slowly eroded. Pair this with the SBC-Adjusted FCF tab to see the full picture of dilution costs.
How to Read the Charts
Look for consistency, not perfection
The best businesses show steady, predictable improvement across most metrics over a decade. Perfection isn't required — what you want to avoid is companies that look great on one metric but terrible on others, or companies where the trend has recently reversed.
Compare across business cycles
If possible, ensure your 10-year window includes at least one economic downturn. How a company performs during a recession tells you more about its moat than how it performs during a boom.
Pair growth with quality
Revenue and EPS growth are meaningless if ROIC is declining. A company that grows by 15% annually but earns only 5% on invested capital is an empire builder, not a compounder. The best investments are companies that grow and maintain high returns on capital.
The Bottom Line
Historical fundamentals are the foundation of value investing. They tell you whether a company's current metrics are a reliable indicator of future performance or an aberration. A decade of consistent, high-quality financial results is the strongest evidence that a competitive moat exists — and that it's likely to persist.
Flip through the tabs on any stock's Historical Fundamentals section on SafetyMargin.io to build a complete picture before making your investment decision.