By Li Jie (李杰)

Compound Interest Believer — Complete Implementation Specification

Based on Li Jie (李杰), Compound Interest Believer (复利信徒) (2020)


Table of Contents

  1. Overview
  2. The Compounding Philosophy
  3. Defining Quality Companies
  4. Valuation Framework
  5. The Three Dimensions of Investing
  6. Portfolio Construction
  7. Holding Discipline
  8. When to Sell
  9. Risk Management
  10. Behavioral Rules
  11. Common Mistakes
  12. Complete Investment Lifecycle Example
  13. Key Quotes / Principles

1. Overview

Li Jie's central conviction is that compounding — the exponential growth of capital over time — is the single most powerful force in investing, yet the one least respected by most market participants. The book is not about finding the next ten-bagger in a year. It is about constructing a process that generates 15-25% annualized returns over 10-20 years, allowing compound interest to do the heavy lifting of wealth creation.

The core argument rests on three pillars:

  1. Compounding requires time. A 20% annualized return held for 20 years turns 1 into 38.3. The same return held for 5 years only turns 1 into 2.5. Most investors destroy their compounding trajectory by trading too frequently, cutting winners short, and resetting the compounding clock.

  2. Compounding requires quality. Only businesses with durable competitive advantages can sustain high returns on capital long enough for compounding to work. A mediocre business that earns 8% ROE does not compound meaningfully even over decades. The engine of compounding is the underlying business, not the stock price.

  3. Compounding requires discipline. The investor must resist the behavioral traps that interrupt compounding: panic selling in bear markets, chasing momentum in bull markets, over-diversifying out of fear, and confusing activity with progress.

Li Jie writes from the perspective of a Chinese A-share investor who has studied Buffett, Munger, and the Western value investing canon, then adapted those principles to the specific realities of China's capital markets — higher volatility, retail-dominated trading, periodic regulatory shocks, and a rapidly evolving economic landscape. The book bridges Graham-Dodd fundamentalism with the practical challenges of investing in Chinese equities.

The operational goal: identify 8-15 exceptional businesses, buy them at or below fair value, hold them for 3-10 years, and let the underlying ROE compound shareholder value. Sell only when the business deteriorates, valuation reaches extreme overvaluation, or a clearly superior opportunity appears.


2. The Compounding Philosophy

2.1 The Mathematics of Compounding

Li Jie insists investors internalize the raw math before making any investment decision:

Annualized Return 5 Years 10 Years 15 Years 20 Years 30 Years
10% 1.61x 2.59x 4.18x 6.73x 17.4x
15% 2.01x 4.05x 8.14x 16.4x 66.2x
20% 2.49x 6.19x 15.4x 38.3x 237x
25% 3.05x 9.31x 28.4x 86.7x 808x

Key insight: the difference between 15% and 20% annualized seems modest over 5 years (2.01x vs 2.49x) but becomes enormous over 20 years (16.4x vs 38.3x). This is why protecting the compounding rate matters more than maximizing any single year's return.

2.2 The Three Enemies of Compounding

  1. Permanent capital loss. A 50% loss requires a 100% gain to break even. A single catastrophic loss can destroy a decade of compounding. Avoiding permanent loss is more important than capturing maximum upside.

  2. Interruption. Every time you sell a compounder and buy something else, you reset the compounding clock, incur transaction costs and taxes, and introduce reinvestment risk. The frictional cost of turnover is far higher than most investors realize.

  3. Mediocre reinvestment. If you compound at 20% for 5 years, sell, then reinvest at 10% for the next 5 years, your total 10-year CAGR is roughly 15% — not 20%. Compounding only works at full power when you remain invested in high-quality assets continuously.

2.3 The Compounding Mindset


3. Defining Quality Companies

3.1 The ROE Framework

Li Jie uses sustained ROE as the primary filter for quality. His hierarchy:

ROE Range Classification Action
> 20% sustained 5+ years Exceptional (卓越) Core holding candidate
15-20% sustained 5+ years Excellent (优秀) Strong candidate
12-15% sustained 5+ years Good (良好) Acceptable if other factors strong
< 12% sustained Mediocre (平庸) Avoid — cannot compound effectively

Critical rule: ROE must be sustained, not cyclical. A company that earned 25% ROE in a boom year and 5% in a downturn has an average ROE of 15% but is NOT a quality compounder. True compounders maintain ROE above 15% through full economic cycles.

3.2 DuPont Decomposition — Preferred Drivers

Not all ROE is created equal. Li Jie ranks the sources of ROE by sustainability:

  1. High net margin (best). Indicates pricing power, brand strength, or unique IP. Examples: Moutai (贵州茅台), leading pharma companies. High-margin ROE is the most durable because it does not depend on leverage or extreme efficiency.

  2. High asset turnover (good). Indicates operational excellence and scale advantages. Examples: leading retailers, consumer staples distributors. Turnover- driven ROE is stable but requires continuous operational discipline.

  3. High financial leverage (worst). Indicates borrowed returns. Leverage-driven ROE is fragile — it amplifies gains in good times and creates existential risk in bad times. Avoid companies whose ROE depends primarily on debt.

Implementation rule: Decompose ROE into margin, turnover, and leverage. Prefer companies where at least 60% of ROE comes from margin and turnover combined, with debt-to-equity below 1.0 for non-financial companies.

3.3 The Moat Checklist

Li Jie adapts Buffett's moat framework with Chinese-market specifics:

Moat Type Description Durability Examples
Brand / pricing power Consumer willing to pay premium; no close substitute Very high Moutai, Haitian Soy Sauce
Switching costs Customer locked in by integration, data, or habit High Enterprise software, banking
Network effects Value increases with each additional user Very high (rare) Tencent, Alibaba platforms
Cost advantage (scale) Unit economics improve with volume; new entrant cannot match High Leading home appliance makers
Regulatory / license Government approval creates barrier Moderate (policy risk) Banking licenses, pharma approvals
Intangible assets / IP Patents, proprietary technology, unique know-how Variable Leading pharma R&D pipelines

Minimum moat requirement: A quality company must have at least one clearly identifiable moat that has been tested in at least one economic downturn and survived intact.

3.4 Management Quality Assessment

Factor What to Look For Red Flag
Capital allocation High ROIC reinvestment, disciplined M&A, buybacks at low valuation Empire-building acquisitions, vanity projects
Shareholder alignment Significant insider ownership, consistent dividends Excessive dilution, pledged shares
Track record Promises met over 5+ year history Frequent strategy pivots, missed guidance
Integrity Transparent reporting, conservative accounting Related-party transactions, aggressive revenue recognition
Industry vision Understanding of secular trends, proactive positioning Reactive, copying competitors

Hard rule: If management has a history of shareholder-unfriendly capital allocation (excessive dilution, overpriced acquisitions, value-destroying diversification), disqualify the company regardless of other merits.

3.5 Financial Health Filters

Metric Minimum Standard
ROE (5-year average) >= 15%
Revenue growth (5-year CAGR) >= 10%
Net margin stability Standard deviation < 5 pct pts over 5 years
Free cash flow Positive in at least 4 of last 5 years
FCF / Net income >= 70% average over 5 years
Debt-to-equity (non-financial) < 1.0
Interest coverage > 5x
Dividend payout > 0% (some return to shareholders)
Goodwill / Total assets < 20%

4. Valuation Framework

4.1 Intrinsic Value Estimation

Li Jie uses a simplified DCF anchored on owner earnings, not reported EPS:

Owner Earnings = Net Income + Depreciation/Amortization - Maintenance CapEx
               ≈ Free Cash Flow (in most cases)

Intrinsic Value = Owner Earnings × Justified P/E Multiple

Where Justified P/E = f(growth rate, ROE sustainability, moat durability)

4.2 Justified P/E Table

Growth + Quality Profile Justified P/E Range
Exceptional moat + 20%+ growth 25-35x
Strong moat + 15-20% growth 20-28x
Good moat + 10-15% growth 15-22x
Moderate moat + 5-10% growth 12-17x
Weak/no moat + < 5% growth 8-12x

Adjustment factors:

4.3 Margin of Safety

Li Jie defines explicit margin-of-safety requirements based on conviction level:

Conviction Level Required Discount to Intrinsic Value
Very high (deep understanding, proven compounder) >= 20%
High (strong analysis, some uncertainty) >= 30%
Moderate (reasonable thesis, material unknowns) >= 40%
Low (speculative, unproven) Do not buy

Operational rule: Never buy any stock trading above estimated intrinsic value, regardless of narrative, momentum, or fear of missing out. The margin of safety is non-negotiable.

4.4 Valuation Cross-Checks

No single valuation method is sufficient. Li Jie requires at least two confirming methods:

  1. P/E relative to historical range. Where does the current P/E sit in the company's own 5-year and 10-year P/E range? Below median is preferred; below 25th percentile is ideal.

  2. PEG ratio. P/E divided by expected earnings growth rate. PEG < 1.0 is attractive; PEG < 0.7 is compelling; PEG > 1.5 for a non-exceptional business signals overvaluation.

  3. EV/EBIT. Enterprise value relative to operating earnings. Useful for comparing companies with different capital structures. Target EV/EBIT < 15 for most quality businesses.

  4. Dividend yield floor. For mature compounders, a dividend yield above the historical average provides a valuation floor. When yield is in the top quartile of its historical range, the stock is likely undervalued.

  5. FCF yield. Free cash flow / market cap. FCF yield > 5% for a quality business is attractive; > 7% is compelling.


5. The Three Dimensions of Investing

Li Jie's central analytical framework evaluates every investment on three independent dimensions. All three must be favorable for a position to be initiated.

5.1 Dimension 1: Good Business (好生意)

This answers: "Is this a business that can compound value over the long term?"

Checklist:

Scoring: Assign 0-10. Minimum threshold: 7/10.

5.2 Dimension 2: Good Price (好价格)

This answers: "Am I paying less than the business is worth?"

Checklist:

Scoring: Assign 0-10. Minimum threshold: 6/10.

5.3 Dimension 3: Good Timing (好时机)

This answers: "Are conditions favorable for the compounding to begin working?"

Li Jie is explicit that timing does NOT mean technical market timing or chart patterns. It means evaluating the macro and business-cycle context:

Checklist:

Scoring: Assign 0-10. Minimum threshold: 5/10.

5.4 Three-Dimension Composite

Composite Score = Business Score × 0.50 + Price Score × 0.35 + Timing Score × 0.15

Minimum for investment: Composite >= 7.0
All three individual dimensions must meet minimum thresholds.

6. Portfolio Construction

6.1 Position Sizing Philosophy

Li Jie advocates concentration in high-conviction ideas. Diversification is a hedge against ignorance; the compounder seeks deep knowledge of fewer names.

Portfolio Tier Number of Holdings Allocation per Position
Core holdings (highest conviction) 3-5 10-20% each
Supporting holdings (strong conviction) 3-5 5-10% each
Watch positions (building conviction) 2-5 2-5% each
Total portfolio 8-15 100%

6.2 Position Sizing Rules

  1. Maximum single position: 20% of portfolio at cost. Allow appreciation up to 30% before considering trim.
  2. Minimum position: 2% of portfolio. Below this, the position cannot meaningfully impact returns and is a distraction.
  3. New position initial size: 3-5% (watch tier). Scale to core tier only after the investment thesis has been confirmed over at least one earnings cycle (2-4 quarters).
  4. Sector concentration limit: No more than 40% in a single sector.
  5. Cash reserve: Maintain 5-15% cash as dry powder for exceptional opportunities. Do not hold > 20% cash for extended periods — uninvested cash is a drag on compounding.

6.3 Building a Position

Li Jie recommends pyramiding into positions:

Phase 1 (Initial): Buy 30% of planned full position at first target price.
Phase 2 (Confirm): Buy 40% after first earnings report confirms thesis.
Phase 3 (Complete): Buy remaining 30% on any pullback or continued confirmation.

Timeline: 3-6 months from initial buy to full position.

If the stock rises 20%+ before the position is fully built, do NOT chase. Accept the smaller position and wait for a pullback or reallocate the capital elsewhere.

6.4 Rebalancing


7. Holding Discipline

7.1 The Long-Term Mindset

Li Jie's core behavioral requirement: once you own a quality compounder at a fair price, your default action is to hold. The burden of proof is on selling, not on holding.

Holding framework:

7.2 What Holding Looks Like in Practice

7.3 Handling Drawdowns

Li Jie provides explicit rules for drawdown situations:

Drawdown Business Intact? Action
-10 to -20% Yes Hold. This is normal volatility.
-10 to -20% Uncertain Review thesis. If thesis intact, hold.
-20 to -30% Yes Consider adding to position if below intrinsic value.
-20 to -30% No Reduce position by 30-50%.
> -30% Yes Strong buy if conviction high and cash available.
> -30% No Exit immediately.

The key distinction is always between price decline (temporary) and value decline (potentially permanent). The compounder adds to positions during price declines and exits during value declines.


8. When to Sell

8.1 The Three Sell Triggers

Li Jie limits selling to three clearly defined scenarios:

Trigger 1: Business deterioration. The competitive advantage that justified the original investment has weakened materially. Signs include:

Action: Sell 100% within 1-2 weeks of reaching this conclusion. Do not average down on a deteriorating business.

Trigger 2: Extreme overvaluation. The stock price has risen far above any reasonable intrinsic value estimate. Li Jie defines "extreme" as:

Action: Trim 30-50% of the position. Retain the remainder in case the business grows into the valuation. Sell the full position only if valuation reaches 2.5x+ justified P/E.

Trigger 3: Clearly superior opportunity. You have identified a new investment that scores higher on all three dimensions (business quality, price, timing) and you have no available cash. This is the rarest sell trigger.

Action: Swap no more than 50% of the lower-conviction position to fund the new idea. Never sell 100% of a proven compounder to fund an unproven idea.

8.2 What is NOT a Sell Trigger


9. Risk Management

9.1 Risk Hierarchy

Li Jie categorizes risk by severity and controllability:

Risk Level Type Mitigation
1 (highest) Permanent capital loss Margin of safety, quality filter, position limits
2 Business model disruption Continuous moat monitoring, sector diversification
3 Valuation compression Buy below intrinsic value, patience
4 Liquidity risk Avoid micro-caps, maintain cash buffer
5 (lowest) Short-term volatility Ignore it — this is the price of compounding

9.2 Pre-Investment Risk Checklist

Before initiating any position, answer these questions:

  1. What could permanently impair this business? (Technology disruption, regulatory change, competitive entry, management fraud.)
  2. How much could I lose in the worst realistic scenario? (Not worst imaginable, but worst plausible over 2-3 years.)
  3. If the stock drops 40% tomorrow, would I add to the position? If the answer is not a confident "yes," the position is too large or conviction is too low.
  4. Does this position create concentration risk with existing holdings? (Same sector, same macro exposure, same customer base.)

9.3 Portfolio-Level Risk Controls

Rule Threshold
Maximum single position (at cost) 20%
Maximum single position (at market) 30% (trigger trim)
Maximum single sector 40%
Maximum correlation cluster 50% (e.g., all consumer + all China GDP-sensitive)
Minimum number of holdings 8
Maximum leverage 0% (never use margin)
Cash reserve floor 5%

9.4 The Anti-Fragility Principle

Li Jie argues that a well-constructed compounding portfolio should benefit from volatility, not merely survive it. When the market panics:

The worst thing you can do during a crisis is become a forced seller yourself. This is why: no leverage, always maintain cash, and hold positions sized so that drawdowns are psychologically bearable.


10. Behavioral Rules

10.1 The Discipline Framework

Rule # Rule Rationale
1 Never buy or sell based on a single day's price action Compounding operates on business fundamentals, not daily noise
2 Never increase a position that is already at maximum size Concentration kills compounding through catastrophic loss
3 Never skip the valuation step, no matter how good the business Overpaying for quality still destroys returns
4 Write down the thesis before buying; revisit annually Forces clarity, prevents narrative drift
5 When in doubt, do nothing The compounding default is to hold
6 Never act on tips, rumors, or social media sentiment These attract the worst behavioral impulses
7 Track business metrics, not stock price Revenue, earnings, ROE, FCF — these are what matter
8 Keep an investment journal Record decisions and reasoning for future review
9 Review mistakes annually Post-mortems build pattern recognition
10 Measure performance over rolling 3-year periods minimum Short-term measurement creates short-term behavior

10.2 The Emotional Circuit Breaker

When you feel the urge to make a trade, Li Jie prescribes a 72-hour cooling period:

  1. Write down what you want to do and why.
  2. Wait 72 hours.
  3. Re-read your written rationale.
  4. If the reasoning still holds after 72 hours, proceed.
  5. If the urgency has faded, the impulse was emotional, not rational.

Exception: the only scenario exempt from the 72-hour rule is evidence of fraud or fundamental business failure. In those cases, sell immediately.

10.3 Cognitive Bias Defenses

Bias How It Manifests Defense
Anchoring Fixating on purchase price or historical high Value business on current fundamentals, not past prices
Confirmation bias Seeking information that supports existing position Actively seek disconfirming evidence; assign a "devil's advocate" review
Loss aversion Holding losers too long, selling winners too early Focus on intrinsic value change, not P&L
Recency bias Overweighting recent events in forecasting Use 5-10 year data windows, not 1-2 quarters
Herding Following consensus into crowded trades Maintain independent research process; be suspicious of consensus
Overconfidence Oversizing positions, underestimating risk Mandate margin of safety; hard position limits

11. Common Mistakes

11.1 Mistakes That Destroy Compounding

  1. Selling winners to buy losers. The instinct to "rebalance" by selling your best performer and adding to your worst is backwards. Winners are winning because the business is compounding. Losers may be losing because the business is deteriorating. Always evaluate on business merit, not on P&L.

  2. Confusing cyclical recovery with secular growth. A company whose earnings double off a cyclical trough is not the same as a company growing earnings 15% per year sustainably. Buying cyclicals at peak earnings (which look like low P/E) is a classic value trap.

  3. Diversifying into mediocrity. Adding a 15th, 20th, or 30th position because it "looks interesting" dilutes the portfolio's quality. Every new position must clear the same quality bar as existing holdings.

  4. Ignoring the balance sheet. A company with 25% ROE and 3x leverage is not the same as one with 25% ROE and no debt. Leverage-driven ROE is fragile and can collapse catastrophically.

  5. Chasing past performance. Buying a stock because it went up 300% last year. The compounding happened for previous shareholders. What matters is the forward return from today's price.

  6. Impatience with the process. Compounding at 20% per year means your money roughly doubles every 3.6 years. In year one, the absolute gains feel small. Many investors abandon the strategy before it has time to work.

  7. Treating stock investing as entertainment. Trading for the thrill of it, checking prices constantly, celebrating daily gains and mourning daily losses. This behavior is incompatible with compounding.

  8. Buying cheap rather than buying quality. A stock trading at 8x earnings may be cheap for good reason — the business is declining. A stock at 25x earnings may be the better value if the business will compound at 20% for a decade.

  9. Ignoring opportunity cost. Holding cash for "safety" when quality businesses are available at fair value. Cash earns 0-3% and is a guaranteed compounding underperformer over long horizons.

  10. Failing to distinguish volatility from risk. A 30% drawdown in a quality business is volatility (temporary). A 30% decline due to competitive displacement is risk (permanent). The correct response to each is opposite.


12. Complete Investment Lifecycle Example

Scenario: Evaluating a Leading Consumer Staples Company

Phase 1: Screening (Week 1)

The investor screens for companies with:

Company X, a leading soy sauce manufacturer, passes all screens:

Phase 2: Deep Analysis (Weeks 2-4)

Business quality (Dimension 1 - Good Business):

Valuation (Dimension 2 - Good Price):

Phase 3: Watchlist and Patience (Months 1-8)

The investor monitors quarterly earnings and waits for a better price. Eight months later, a broad market selloff (unrelated to the company) pushes the stock down 25%.

Updated valuation:

Timing (Dimension 3 - Good Timing):

Composite score: 9 × 0.50 + 8 × 0.35 + 7 × 0.15 = 4.50 + 2.80 + 1.05 = 8.35 Well above the 7.0 minimum. Proceed.

Phase 4: Position Building (Months 8-12)

Full position: 10% of portfolio. Classification: Supporting holding.

Phase 5: Holding and Monitoring (Years 1-5)

Position is now worth 2.1x initial investment (including dividends reinvested). CAGR: approximately 16%. Continue holding.

Phase 6: Eventual Exit (Year 7)

In year 7, a new regulatory framework significantly increases production compliance costs for the entire industry. Company X can absorb the costs due to scale, but net margin drops from 20% to 15%. ROE falls to 17%. At the same time, a technology-forward competitor is gaining share rapidly with a direct-to-consumer model.

Assessment: Moat is weakening, though not destroyed. ROE still above 15% but trajectory is negative. Competitive landscape shifting.

Decision: Reduce position from 15% to 7%. Redeploy capital to a higher-conviction holding. Continue monitoring the reduced position.

In year 8, margins stabilize at 15% but market share loss accelerates. ROE drops to 14% — below the 15% minimum threshold. Sell trigger 1 (business deterioration) activated.

Decision: Exit remaining position. Total holding period: 8 years. Total return: approximately 3.5x (including dividends). CAGR: approximately 17%.

14. Key Quotes / Principles

"复利的第一条铁律是:永远不要亏损。第二条铁律是:永远不要忘记第一条。" "The first iron law of compounding: never lose money. The second iron law: never forget the first."

"时间是优秀企业的朋友,是平庸企业的敌人。" "Time is the friend of a wonderful business and the enemy of a mediocre one."

"投资中最难的不是找到好公司,而是在找到好公司后什么都不做。" "The hardest part of investing is not finding good companies — it is doing nothing after you have found them."

"真正的复利信徒不关注一年赚了多少,只关注十年后能赚多少。" "A true compound interest believer does not care how much he earns in a year; he only cares about how much he will earn in a decade."

"好公司不等于好投资。好公司加好价格才等于好投资。" "A good company does not equal a good investment. A good company at a good price equals a good investment."

"大多数投资者不是死于熊市的恐惧,而是死于牛市的贪婪。" "Most investors do not die from bear market fear — they die from bull market greed."

"持有优秀公司的最大成本不是资金,而是耐心。" "The greatest cost of holding an excellent company is not capital — it is patience."

"当你的股票下跌30%而你想卖出时,问自己:如果我没有持有这只股票,我会在这个价格买入吗?如果答案是肯定的,那就继续持有。" "When your stock drops 30% and you want to sell, ask yourself: if I did not already own it, would I buy it at this price? If the answer is yes, keep holding."

"投资组合应该像一个球队,每个成员都必须是精英,而不是像一个村庄,什么人都有。" "A portfolio should be like a championship team where every member is elite, not like a village where anyone is welcome."

"频繁交易是复利的天敌。每一次买卖都是对复利链条的一次打断。" "Frequent trading is the mortal enemy of compounding. Every buy and sell interrupts the compounding chain."


End of implementation specification.