Buffett Financial Analysis

Buffett Financial Statement Analysis

This skill applies Warren Buffett's framework for identifying companies with a durable competitive advantage (DCA) — the single most important factor in his investment approach. The goal is not to find cheap stocks, but to find exceptional businesses worth owning for 10–20+ years.

Core Investment Philosophy

Buffett divides businesses into two groups:

1. Companies with a durable competitive advantage — sell a unique product/service or are the low-cost buyer/seller of a product the public consistently needs. Their earnings are consistent and grow over time.
2. Mediocre companies — compete in fiercely competitive markets, suffer boom/bust cycles, require constant capital reinvestment, and rarely create long-term shareholder wealth.

What creates a DCA:

• Selling a unique product (Coca-Cola, Wrigley, Hershey, Pepsi)
• Selling a unique service (Moody's, American Express, H&R Block)
• Being the low-cost buyer/seller of a needed product (Walmart, Costco, Burlington Northern)

The key word is "durability" — look for consistency across 5–10 years of data, not a single good year.

Step-by-Step Analysis Framework

When analyzing a company, work through all three financial statements in order. Request 10 years of data where possible — single-year snapshots are nearly worthless for this analysis.

PART 1: INCOME STATEMENT ANALYSIS

1. Gross Profit Margin

Formula: Gross Profit ÷ Total Revenue

Reference points: Moody's: 73%, Coca-Cola: 60%+, Wrigley: 51%, Burlington Northern: 61% vs. United Airlines: 14%, GM: 21%, U.S. Steel: 17%.

Critical: Check this number consistently over 10 years. One-time high margins mean nothing.

2. Selling, General & Administrative (SGA) Expenses

Formula: SGA ÷ Gross Profit

Watch for wild year-to-year variation — that signals a company without a DCA reacting to competitive pressure. GM swung from 28% to 83%; Ford hit 89%–780%.

3. Research & Development (R&D) Expenses

• Little or no R&D = good. Companies with a true DCA don't need to constantly reinvent their products (Coca-Cola, Wrigley, Moody's have zero R&D).
• High R&D = risk. If the competitive advantage depends on patents or technology, it is fragile — patents expire, technology gets disrupted.
• Rule: If a company must spend heavily on R&D to maintain its advantage, the advantage is not durable. Avoid.
• Intel (30% of gross profit on R&D), Merck (29% R&D + 49% SGA = 78% combined) are examples of DCA fragility.

4. Depreciation as % of Gross Profit

• Companies with DCA have lower depreciation relative to gross profit because their products don't change, so their plant/equipment lasts longer.
• Coca-Cola: ~6%, Wrigley: ~7%, P&G: ~8%
• GM: 57–72% — capital-intensive, constantly retooling
• Lower = better.

5. Interest Expense as % of Operating Income

• Consumer products DCA companies: < 15% is the target.
• Compare within the same industry — Wells Fargo at 30% is excellent for banking; 30% for a manufacturer is bad.
• Procter & Gamble: 8%, Wrigley: 7% vs. Goodyear: 49%, American Airlines: 92%
• Companies with DCA tend to carry little debt, so little interest expense.
• Red flag: If interest expense as a % of operating income spikes dramatically (Bear Stearns went from 70% to 230% before collapse), danger is imminent.

6. Net Earnings Margin

Formula: Net Earnings ÷ Total Revenue

Exception: Banks and financial companies — abnormally high net margins may signal excessive risk-taking, not a DCA.

Reference: Coca-Cola: 21%, Moody's: 31% vs. Southwest Airlines: 7%, GM: 3% (in good years).

Look for consistent upward trend — not just absolute margin level.

7. Per-Share Earnings (EPS) — 10-Year Trend

This is one of the most important single indicators.

Ideal pattern (Buffett wants to see):

• Consistent upward trend over 10 years
• No large losses or erratic swings
• Example: $1.30 → $1.42 → $1.48 → $1.60 → $1.65 → $1.95 → $2.06 → $2.17 → $2.37 → $2.68 → $2.95

Red flag pattern:

• Wild swings, losses mixed with profits, downward trend
• Example: $8.53 → $6.68 → $5.24 → $1.77 → $3.35 → $5.03 → $6.39 → ($6.05) loss → $3.89 → ($0.45) loss → $2.50

Note: Also look at total net earnings, not just per-share, since buybacks can inflate EPS even when actual profits are flat or declining.

8. Income Taxes Paid (Truth Test)

• Take reported pre-tax income and multiply by ~35% (US corporate rate, adjust for current rates).
• If taxes paid ≠ approximately 35% of pre-tax income, question the accuracy of reported earnings.
• Companies trying to mislead the IRS are usually also misleading shareholders.

PART 2: BALANCE SHEET ANALYSIS

9. Cash & Cash Equivalents

• Large cash pile from operations (not from debt issuance or asset sales) = strong DCA signal.
• Check 7+ years of balance sheets: Is cash growing consistently from business operations alone?
• Little cash + large debt = mediocre business struggling to survive.
• Large cash + little/no debt + no new share issuance + consistent earnings = excellent DCA candidate.

10. Inventory (Manufacturing Companies)

• Look for inventory and net earnings rising in tandem over time — indicates profitable growth.
• Inventory that rapidly ramps up then crashes = boom/bust competitive industry. Avoid.

11. Net Receivables vs. Competitors

• Compare Net Receivables as a % of Gross Sales against industry peers.
• Consistently lower than competitors = pricing/demand advantage (customers pay faster).

12. Property, Plant & Equipment (PP&E)

• DCA companies don't need to constantly upgrade their plant/equipment — their products don't change.
• They replace equipment when it wears out, not before.
• Companies without DCA must constantly retool to stay competitive, generating ongoing debt.
• Compare Wrigley ($1.4B PP&E, $1B debt, $500M earnings) vs. GM ($56B PP&E, $40B debt, losing money).

13. Goodwill

• Rising goodwill = company is acquiring other businesses. Are those businesses also DCA companies?
• Companies with DCA rarely sell below book value — so acquisitions of DCA companies always create goodwill.
• Stable goodwill = not acquiring, or buying at/below book value.

14. Long-Term Debt — The Most Critical Balance Sheet Indicator

Rule: Little or no long-term debt = good long-term bet.

• DCA companies are so profitable they self-finance and rarely need debt.
• Check 10 years of balance sheets for consistently low or no long-term debt.
• Key test: Can the company pay off all long-term debt from 3–4 years of net earnings?
  • Coca-Cola and Moody's: can pay off in 1 year ✓
  • Wrigley, Washington Post: can pay off in 2 years ✓
  • GM, Ford: could spend every dime of earnings for 10+ years and still not pay it off ✗

Post-LBO exception: If a DCA company has excessive debt from a leveraged buyout, consider its bonds instead of equity — earnings will be focused on debt payoff, not growth.

15. Short-Term Debt (for Financial Institutions)

• Avoid banks/financials with more short-term debt than long-term debt.
• Wells Fargo: 57¢ short-term per $1 long-term (conservative) ✓
• Bank of America: $2.09 short-term per $1 long-term (aggressive) ✗
• Short-term borrowing to fund long-term assets is the classic recipe for financial collapse.

16. Retained Earnings — Warren's Secret Weapon

• Growing retained earnings year-over-year = one of the strongest DCA indicators.
• Formula: Prior retained earnings + Net earnings − Dividends − Stock buybacks = New retained earnings
• Annual growth rates of Buffett favorites: Coca-Cola: 7.9%, Wrigley: 10.9%, Burlington Northern: 15.6%, Wells Fargo: 14.2%, Berkshire Hathaway: 23%
• Negative retained earnings from losses = mediocre business.
• Negative retained earnings from profitable companies that returned all capital to shareholders (like Microsoft historically) = can be a DCA company, but verify with earnings history.

17. Treasury Stock

• Presence of treasury stock + history of buybacks = hallmark of DCA.
• Only companies generating excess cash can afford consistent buybacks.
• Also increases per-share earnings (fewer shares = higher EPS per dollar of net income).

18. Return on Shareholders' Equity (ROE)

Formula: Net Earnings ÷ Shareholders' Equity

• DCA companies consistently show higher-than-average ROE.
• Coca-Cola: 30%, Wrigley: 24%, Hershey's: 33%, Pepsi: 34%
• Airlines (no DCA): United: 15% (profitable years), American: 4%, Delta/Northwest: negative
• Caution: Very high ROE may be from leverage (debt) rather than genuine business strength. Test: Add treasury stock back to equity, recalculate ROE — if still high, it's real.

19. Debt-to-Equity Ratio (Adjusted for Treasury Stock)

Formula: Total Liabilities ÷ (Shareholders' Equity + Treasury Stock)

• Add back treasury stock value before comparing — otherwise buyback-heavy companies look artificially leveraged.
• P&G adjusted: 0.71, Wrigley adjusted: 0.68, Goodyear: 4.35, Ford: 38.0
• Banks are a special case — ratios of 7–10x are normal; look for lower-than-peers as the signal.

20. Preferred Stock

• Absence of preferred stock = good sign. DCA companies don't need expensive external capital.
• Preferred dividends are not tax-deductible (unlike interest), making it costly money.
• Companies that issue preferred stock often need capital they can't generate internally.

21. Return on Total Assets

Formula: Net Earnings ÷ Total Assets

• Higher is generally better, but very high returns on assets may signal fragility in the DCA.
• Coca-Cola: 12% (huge asset base = high barrier to entry) ✓
• Moody's: 243% (tiny asset base = low barrier to entry, vulnerable to new competition) ⚠️
• High assets = high cost for a competitor to replicate = more durable DCA.

PART 3: CASH FLOW STATEMENT ANALYSIS

22. Capital Expenditures as % of Net Earnings (10-Year Total)

Formula: 10-year total capex ÷ 10-year total net earnings

Reference points:

• Moody's: 5%, Coca-Cola: 19%, American Express: 23%, Altria: 20%, P&G: 28%
• Wrigley: 49% (borderline but still DCA)
• GM: 444% more than earnings, Goodyear: 950% more — funded by debt

23. Stock Buybacks History

• Check "Issuance (Retirement) of Stock, Net" in the financing activities section.
• Consistent, year-after-year buybacks = strong DCA indicator.
• Companies buy back shares only when they have excess free cash flow.

24. Free Cash Flow

• Operating Cash Flow − Capital Expenditures = Free Cash Flow
• DCA companies generate substantial, growing free cash flow.
• Negative or shrinking free cash flow over multiple years = serious concern.

PART 4: VALUATION — THE EQUITY BOND FRAMEWORK

Buffett treats shares of DCA companies as "equity bonds" — the earnings per share are like the coupon payment on a bond, but one that grows every year.

Initial Yield Calculation

Formula: EPS (pretax) ÷ Purchase Price = Initial Pretax Yield

• Think of this like a bond yield: you're buying $X of pretax earnings per dollar invested.
• Then project earnings growth forward at the historical rate (use 10-year average EPS growth).

Capitalized Value (What Is the Stock Worth?)

Formula: Annual pretax EPS ÷ Current long-term corporate bond rate = Intrinsic value per share

• If pretax EPS is $3.96 and corporate bonds yield 6.5%: $3.96 ÷ 0.065 = $60/share intrinsic value.
• Compare this to the current stock price.

When to Buy

• Bear markets — even DCA companies fall in broad selloffs; lower price = higher initial yield.
• One-time solvable problems — great business + temporary issue (New Coke, scandal, etc.) = buying opportunity. Key word: solvable.
• When the company's stock price implies a yield that is attractive relative to other long-term investments.
• Avoid: Peak bull markets when P/E ratios reach 40+ on DCA companies.

When to Sell

1. When you find a significantly better opportunity at a better price.
2. When the company appears to be losing its DCA (e.g., newspapers when internet disrupted them).
3. When P/E reaches 40+ in a raging bull market — consider rotating to Treasuries and waiting.
4. Default position: Never sell. The longer you hold a true DCA company, the better your compounding return. Selling also triggers taxes, which destroys compounding.

Summary Scorecard

Use this checklist when analyzing a company. The more checks, the stronger the DCA signal:

Income Statement ✓

• Gross profit margin consistently ≥ 40% over 10 years
• SGA expenses as % of gross profit ≤ 80% and stable
• Little or no R&D expense
• Low depreciation as % of gross profit (< 15%)
• Interest expense < 15% of operating income (for non-financials)
• Net earnings margin consistently > 20%
• EPS shows consistent upward trend over 10 years (no large losses)
• Income taxes paid ≈ 35% of pre-tax earnings (integrity check)

Balance Sheet ✓

• Large cash pile built from operations, not debt
• Inventory grows in tandem with net earnings
• Long-term debt payable in < 4 years of net earnings
• Little or no long-term debt on balance sheet for 10 years
• Growing retained earnings year-over-year
• Presence of treasury stock / history of buybacks
• ROE consistently > 15–20% (verify it's not from leverage)
• Adjusted debt/equity < 0.80 (non-financials)
• No preferred stock

Cash Flow ✓

• Capital expenditures < 25% of net earnings (10-year average)
• Consistent stock buyback program
• Growing positive free cash flow

Valuation ✓

• Initial pretax yield is attractive relative to corporate bond yields
• Capitalized value (EPS ÷ bond rate) exceeds current market price
• P/E ratio is not at historic highs (avoid P/E > 40)
• Business has a one-time solvable problem (opportunistic entry)

Red Flags — Companies to Avoid

• High, volatile, or rising R&D expense (patent cliffs, tech disruption risk)
• Consistent losses or erratic per-share earnings history
• Long-term debt that would take more than 5 years of earnings to repay
• Capital expenditures exceeding net earnings
• SGA expenses near or above 100% of gross profit
• Declining or negative retained earnings from losses
• Heavy use of short-term debt to fund long-term assets
• Frequent issuance of new shares (diluting existing shareholders)
• EBITDA-focused management communication ("EBITDA is stupid" — Buffett)

How to Use This Skill

When a user asks you to analyze a company:

1. Ask for the data if not provided: Request 10 years of income statements, balance sheets, and cash flow statements. Alternatively, use public sources (SEC EDGAR 10-K filings, Yahoo Finance, Macrotrends.net).

2. Work through each section of this framework systematically.

3. Calculate the key ratios listed above for each available year — consistency is more important than any single year's number.

4. Render a verdict on whether the company shows signs of a durable competitive advantage, explaining which indicators support or contradict the thesis.

5. Provide a valuation estimate using the equity bond framework if data permits.

6. Be explicit about uncertainties — missing data, recent business model changes, or industries where the standard thresholds may not apply (financial institutions, asset-heavy industries, capital-light software).

Remember: The goal is not to find the cheapest stock, but to find the best business at a fair price — one you'd be comfortable owning for 20 years.