Berkshire requires a 25–50% discount to intrinsic value before buying.
Buffett Quality Checklist
✗ROE >15% consistently (≥7 of last 10 years)
✗Free cash flow positive (≥8 of last 10 years)
–Conservative leverage — Debt/Equity below 1
✗Revenue growing at CAGR >5%
✓EPS growing at CAGR >5%
10-Year Financial History — SEC EDGAR 10-K Filings
Year▲
Revenue▲
Net Income▲
FCF▲
Owner Earnings▲
ROE▲
Net Margin▲
LT Debt▲
Cash▲
2016
$22.6B
$2.7B
—
—
13.0%
11.8%
—
$4.9B
2017
$21.7B
$4.6B
—
—
18.7%
21.2%
—
$3.5B
2018
$21.8B
$2.9B
—
—
12.4%
13.4%
—
$4.3B
2019
$22.3B
$3.3B
—
—
11.4%
14.8%
—
$4.9B
2020
$22.1B
$4.8B
—
—
14.2%
21.6%
—
$5.1B
2021
$21.6B
$4.2B
—
—
24.8%
19.6%
—
$5.1B
2022
$19.1B
$4.4B
—
—
21.9%
23.1%
—
$3.9B
2023
$18.7B
$4.7B
—
—
21.2%
24.9%
—
$4.3B
2024
$18.9B
$5.4B
—
—
20.9%
28.8%
—
$6.2B
2025
$17.2B
$3.6B
—
—
12.4%
21.2%
—
$6.2B
Warren & Charlie
Buffett / Munger — quality, moat & valuation
AFLAC INC (AFL) — Investment Memo
🐂 The Bull Case (Warren's voice)
The Float Machine: Aflac isn't just an insurance company; it's a low-cost capital acquisition vehicle. They collect premiums upfront and earn a spread on the "float" through a diversified portfolio of bonds and equities. This is the Berkshire blueprint.
The Japanese Toll Bridge: The moat in Japan is exceptional. By embedding themselves into the payroll deduction systems of the Japanese workforce, they have created a "habit" business. It is far easier to keep a customer via payroll than to acquire one via a sales call.
Operating Leverage: The numbers show a rare and beautiful trend: Revenue is shrinking ($22.6B → $17.2B) while Net Income is climbing ($2.7B → $3.6B). They are shedding low-margin weight and expanding margins from 11.8% to 21.2%. They are doing more with less.
Disciplined Capital Allocation: No "diworse-ification." No empire-building acquisitions. They focus on the portfolio and returning cash to shareholders via buybacks. They act like owners, not managers.
Attractive Range: This becomes a "no-brainer" if the price drops to a level where the yield on the float exceeds the cost of equity significantly—specifically, anywhere near $60.00 or below.
🐻 The Bear Case (Charlie inverts)
The Demographic Cliff: Aflac is heavily bet on Japan. Japan is an aging society with a shrinking population. If the workforce collapses or the "payroll habit" breaks because there are no more workers to enroll, the moat isn't just breached—it evaporates.
The Interest Rate Trap: The "magic" of the earnings growth is likely tied to the investment portfolio (Fixed Maturities/Commercial Loans). A systemic credit event or a permanent return to negative interest rates in Japan would crush the spread. If the float stops earning, the business is just a claims-paying machine.
The Regulatory Stroke of a Pen: Aflac exists in the "supplemental" niche. If the Japanese or US governments expand state-sponsored medical coverage to include these specific niches, Aflac’s product becomes a redundant expense.
Most Likely Failure: Demographic collapse in Japan. Timeframe: 10–20 years. It is a slow-motion train wreck that can't be fixed by better management.
💰 Valuation & Margin of Safety
The DCF is conservative, assuming negative FCF growth, which reflects the demographic headwinds.
Intrinsic value estimate: $70.08 per share
25% margin of safety entry: $52.56(conservative)
50% margin of safety entry: $35.04(Buffett's ideal)
Current Status: Expensive. If the market price is anywhere above $70.08, we are paying for growth that the DCF suggests isn't coming. We are paying a premium for a moat that is slowly shrinking in size.
Verdict: PASS
The business is high-quality, but the price is disconnected from the intrinsic value of $70.08. While the moat is durable, the demographic inversion in Japan creates a structural ceiling on long-term growth. We wait for a panic to bring the price toward $52.00.
Other Analyst Views· Lynch · Damodaran
Research Notes· Money Model · Moat · Financials · Management
Data sourced from SEC EDGAR XBRL filings (10-K only). For educational purposes — not investment advice.