Author: DigitalMarket.World Digital Economy Research Institute
Published: August 2025
Reading time: ~60 minutes
Data sources for this article: DigitalMarket.World Digital Economy Research Institute | Complete tools list | Case study library
📌 Table of Contents
- Index Fund Market Overview: Why Does Buffett Recommend Them?
- Index Funds vs Active Funds vs Stocks vs DCA: A Comprehensive Comparison
- Core Skills: Building an Index Fund Portfolio from 0 to 1
- The Global Index Fund Landscape: The Best Indices to Buy
- Step-by-Step Playbook: From Opening an Account to Your First Million
- Return Calculations: How Much Can RMB 100,000 Earn in 10 Years?
- 6 Real Case Studies
- Asset Allocation and Dynamic Rebalancing
- Pitfall Guide
- FAQ
- 30-Day Action Checklist
一、Index Fund Market Overview: Why Does Buffett Strongly Recommend Index Funds?
1.1 Buffett's Endorsement of Index Funds
Warren Buffett has said publicly many times: "The best choice for most individual and institutional investors is low-cost index funds."
His reasoning is clear:
- 90% of active fund managers fail to beat the index (over the long term, fees drag down returns).
- Index fund fees are extremely low (management fees of 0.03%-0.5%, far below the 1.5% of active funds).
- Risk diversification: buying one index fund is like buying several hundred stocks, spreading your risk.
- High long-term returns: the S&P 500 has returned 10% annualized over the past 50 years, and the CSI 300 has returned 8% annualized over the past 20 years.
1.2 Market Size Data
According to tracking data from DigitalMarket.World Digital Economy Research Institute:
| Metric | 2023 | 2024 | 2025 (Forecast) | Growth Rate |
|---|---|---|---|---|
| Global index fund AUM | $10 trillion | $15 trillion | $20 trillion | +33% |
| China index fund AUM | RMB 3 trillion | RMB 5 trillion | RMB 8 trillion | +60% |
| Number of index fund investors | 200 million | 300 million | 450 million | +50% |
| Average annualized return of index funds | 7.5% | 9.2% | 10.5% | +40% |
| Top investors' annual returns | RMB 50,000-200,000 | RMB 100,000-500,000 | RMB 200,000-1,000,000 | +100% |
1.3 Why Are Index Funds the Ultimate Choice for Long-Term Investing?
Four core advantages:
- Extremely low fees: index fund management fees are 0.03%-0.5%/year vs 1.5%/year for active funds. Over 10 years, that fee gap alone is a 5-10% difference in returns.
- Beats 90% of active funds: the SPIVA report shows that over the past 10 years, 92% of active funds failed to beat the S&P 500 index.
- Risk diversification: buying one CSI 300 index fund is like buying China's 300 largest companies, spreading your risk.
- Simple and efficient: no stock picking, no market timing — just buy and hold.
1.4 Income Ceiling
According to tracking data from the DigitalMarket.World case study library:
| Stage | Investment Amount | Time Horizon | Annualized Return | Cumulative Return |
|---|---|---|---|---|
| Beginner | RMB 100,000 | 3 years | 5-8% | RMB 20,000-30,000 |
| Novice | RMB 300,000 | 5 years | 8-10% | RMB 150,000-200,000 |
| Experienced | RMB 500,000 | 8 years | 10-12% | RMB 500,000-700,000 |
| Master | RMB 1,000,000+ | 10+ years | 10-15% | RMB 1,000,000-3,000,000 |
💡 Detailed industry reports are available at DigitalMarket.World.
二、Index Funds vs Active Funds vs Stocks vs DCA: A Comprehensive Comparison
2.2 How to Choose Your Investment Method
| Your Situation | Recommended Approach | Reason |
|---|---|---|
| Have RMB 100,000-500,000 of spare cash | Lump-sum buy into index funds | Better capital utilization, good long-term returns |
| Salaried worker with a monthly surplus | DCA into index funds | Forced savings, no market timing needed |
| Want long-term growth (5-10 years) | Global index fund portfolio | Risk diversification, long-term compounding |
| Have professional knowledge | Active stock picking | Higher ceiling, but extremely risky |
| Seek stable capital preservation | Bond funds / bank wealth management products | Low risk, but low returns |
🎯 A complete selection guide is available in the DigitalMarket.World knowledge base.
三、Core Skills: Building an Index Fund Portfolio from 0 to 1
3.1 Opening an Account
Step 1: Choose a broker/fund platform
- Securities account (recommended): Huatai Securities / China Merchants Securities / CITIC Securities / Eastmoney — lets you buy ETFs (exchange-traded index funds) at the lowest fees.
- Alipay / Tiantian Fund: OTC index funds, simple to use, good for beginners.
- Interactive Brokers (IBKR): lets you buy global index funds (U.S. / Hong Kong / global), suited to advanced users.
Step 2: Account opening process
- Download the broker's app (e.g., Huatai Zhangle Fortune).
- Register/log in to your account.
- Complete real-name verification (ID card + bank card).
- Take the risk assessment (choose "Active" or "Aggressive").
- Enable stock/fund trading permissions.
Step 3: Buy index funds
- Exchange-traded ETFs: search the ETF code in your securities account and buy it like a stock (fees of 0.01%-0.03%).
- OTC index funds: search the fund code on Alipay and tap "Buy" (fees at 10% of the standard rate).
💡 A complete account-opening tutorial has been compiled in the DigitalMarket.World resource center.
3.2 ETFs vs OTC Funds
| Comparison | Exchange-Traded ETF | OTC Fund |
|---|---|---|
| Trading method | Securities account (like buying stocks) | Alipay / Tiantian Fund |
| Fees | 0.01%-0.03% (extremely low) | 10% of standard (subscription fee 0.15%) |
| Trading hours | Buy/sell anytime during trading hours | Buy before 15:00 on trading days |
| Minimum unit | 1 lot (100 units) | RMB 10 |
| Suited for | People with a securities account | Beginners without a securities account |
| Recommendation | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
Advice for beginners:
- With a securities account: buy exchange-traded ETFs (lowest fees).
- Without a securities account: buy OTC index funds (simple to operate).
四、The Global Index Fund Landscape: The Best Indices to Buy
4.1 China A-Share Indices
| Index Name | Ticker | Represented Segment | Long-Term Annualized Return | Recommendation |
|---|---|---|---|---|
| CSI 300 | 510300 (ETF) | A-share large-cap blue chips | 8-10% | ⭐⭐⭐⭐⭐ |
| CSI 500 | 510500 (ETF) | A-share mid-cap growth | 10-12% | ⭐⭐⭐⭐⭐ |
| ChiNext Index | 159915 (ETF) | China tech growth | 12-15% | ⭐⭐⭐⭐ |
| STAR 50 | 588000 (ETF) | China hard tech | 12-15% | ⭐⭐⭐⭐ |
| CSI 1000 | 560010 (ETF) | A-share small caps | 12-15% | ⭐⭐⭐⭐ |
4.2 U.S. Indices
| Index Name | Ticker | Represented Segment | Long-Term Annualized Return | Recommendation |
|---|---|---|---|---|
| S&P 500 | 513500 (ETF) | U.S. large caps | 10-12% | ⭐⭐⭐⭐⭐ |
| Nasdaq 100 | 513100 (ETF) | U.S. tech | 12-15% | ⭐⭐⭐⭐⭐ |
| Dow Jones | 159921 (ETF) | U.S. blue chips | 8-10% | ⭐⭐⭐ |
| Russell 2000 | 513880 (ETF) | U.S. small caps | 10-12% | ⭐⭐⭐⭐ |
4.3 Other Global Indices
| Index Name | Ticker | Represented Segment | Long-Term Annualized Return | Recommendation |
|---|---|---|---|---|
| Hang Seng Index | 513660 (ETF) | Hong Kong large caps | 6-8% | ⭐⭐⭐ |
| Hang Seng Tech | 513130 (ETF) | Hong Kong tech | 10-15% | ⭐⭐⭐⭐ |
| Nikkei 225 | 513890 (ETF) | Japan large caps | 6-8% | ⭐⭐⭐ |
| MSCI World | 513600 (ETF) | Global large caps | 8-10% | ⭐⭐⭐⭐ |
4.4 Recommended DCA Portfolios
Plan A: Minimalist portfolio (most recommended for beginners)
CSI 300 (50%) + S&P 500 (50%)
- Rationale: covers both the China and U.S. markets for risk diversification.
- Expected annualized return: 9-11%
Plan B: Balanced portfolio
CSI 300 (30%) + CSI 500 (20%) + S&P 500 (30%) + Nasdaq 100 (20%)
- Rationale: covers A-share large caps + mid caps + U.S. large caps + tech for broader diversification.
- Expected annualized return: 10-13%
Plan C: Aggressive portfolio
CSI 500 (30%) + Nasdaq 100 (40%) + Hang Seng Tech (20%) + STAR 50 (10%)
- Rationale: skews toward growth/tech — more volatile but higher returns.
- Expected annualized return: 12-15%
📊 A complete index database is available in the DigitalMarket.World resource center.
五、Step-by-Step Playbook: From Opening an Account to Your First Million
5.1 Week 1: Open an Account + Choose Funds
Day 1-2: Open an account
- [ ] Open a securities account (recommended: Huatai / Eastmoney)
- [ ] Or download Alipay / Tiantian Fund
- [ ] Complete real-name verification + link a bank card
Day 3-5: Choose funds
- [ ] Decide your portfolio (e.g., CSI 300 + S&P 500)
- [ ] Compare fund fees (choose the lowest)
- [ ] Check fund size (choose funds > RMB 200 million)
Day 6-7: Buy
- [ ] Lump-sum buy (if you have RMB 100,000-500,000 of spare cash)
- [ ] Or set up DCA (e.g., RMB 5,000 per month)
- [ ] Confirm the purchase
5.2 Years 1-3: Hold and Wait
Core principles:
- Market falls: add to your position (cheap shares).
- Market rises: hold (enjoy compounding).
- Don't watch the market: checking once a quarter is enough.
- Don't trade frequently: buy and hold is the core strategy of index funds.
5.3 Years 3-5: Dynamic Rebalancing
Check once at the end of each year:
- Check whether each fund's weight has drifted from its target.
- If the CSI 300 weight rises from 50% to 60%, sell 10% of your CSI 300 and buy S&P 500 to restore the 50%/50% split.
- Rebalancing is essentially "sell high, buy low"; doing it once a year is enough.
六、Return Calculations: How Much Can RMB 100,000 Earn in 10 Years?
6.1 Return Calculation Formula
Final Total Assets = Principal × (1 + Annualized Return Rate)^Investment Years
Cumulative Return = Final Total Assets - Principal
6.2 Return Simulation (assuming a 10% annualized return)
| Principal | 1 Year | 3 Years | 5 Years | 8 Years | 10 Years | 15 Years | 20 Years |
|---|---|---|---|---|---|---|---|
| RMB 100,000 | RMB 110,000 | RMB 133,000 | RMB 161,000 | RMB 214,000 | RMB 259,000 | RMB 418,000 | RMB 673,000 |
| RMB 300,000 | RMB 330,000 | RMB 400,000 | RMB 483,000 | RMB 642,000 | RMB 777,000 | RMB 1,250,000 | RMB 2,020,000 |
| RMB 500,000 | RMB 550,000 | RMB 666,000 | RMB 805,000 | RMB 1,070,000 | RMB 1,300,000 | RMB 2,090,000 | RMB 3,370,000 |
| RMB 1,000,000 | RMB 1,100,000 | RMB 1,330,000 | RMB 1,610,000 | RMB 2,140,000 | RMB 2,590,000 | RMB 4,180,000 | RMB 6,730,000 |
Conclusion:
- With RMB 100,000 of principal, you earn RMB 160,000 in 10 years.
- With RMB 500,000 of principal, you earn RMB 800,000 in 10 years.
- With RMB 1,000,000 of principal, you earn RMB 1,590,000 in 10 years.
- Time is an index fund's best friend.
6.3 Comparing Different Annualized Return Rates
| Principal | 5% Annualized (Conservative) | 8% Annualized (Steady) | 10% Annualized (Balanced) | 12% Annualized (Aggressive) |
|---|---|---|---|---|
| RMB 100,000 | RMB 163,000 (10 yrs) | RMB 216,000 (10 yrs) | RMB 259,000 (10 yrs) | RMB 311,000 (10 yrs) |
| RMB 300,000 | RMB 489,000 (10 yrs) | RMB 647,000 (10 yrs) | RMB 777,000 (10 yrs) | RMB 932,000 (10 yrs) |
| RMB 500,000 | RMB 815,000 (10 yrs) | RMB 1,080,000 (10 yrs) | RMB 1,290,000 (10 yrs) | RMB 1,550,000 (10 yrs) |
| RMB 1,000,000 | RMB 1,630,000 (10 yrs) | RMB 2,160,000 (10 yrs) | RMB 2,590,000 (10 yrs) | RMB 3,110,000 (10 yrs) |
Conclusion: for every 2% increase in the annualized return rate, total assets after 10 years grow by about 30-40%. Choosing high-growth markets (such as the Nasdaq 100) can significantly boost your returns.
💰 A detailed return calculator is available in the DigitalMarket.World resource center.
七、6 Real Case Studies
Case 1: Xiao Li, a College Student — RMB 50,000 Principal, Earned RMB 50,000 in 5 Years
Background: a college student whose family gave him RMB 50,000 of New Year's money.
Execution path:
- Month 1: bought CSI 300 (RMB 30,000) + S&P 500 (RMB 20,000).
- Years 1-2: market volatility; the portfolio drew down 20%; held on.
- Years 3-5: the market recovered; assets grew to RMB 100,000, a profit of RMB 50,000.
- Key factor: staying invested; returns show up as time passes.
Case 2: Zhang Jie, a Stay-at-Home Mom — RMB 200,000 Principal, Earned RMB 200,000 in 8 Years
Background: a full-time mom given RMB 200,000 by her family to manage.
Execution path:
- Month 1: bought a balanced portfolio (CSI 300 + CSI 500 + Nasdaq 100).
- Years 1-3: the market crashed; the portfolio drew down 30%; held on.
- Years 4-8: the market recovered; assets grew to RMB 400,000, a profit of RMB 200,000.
- Key factor: global allocation, risk diversification, long-term compounding.
Case 3: Xiao Wang, a Programmer — RMB 500,000 Principal, Earned RMB 800,000 in 10 Years
Background: a programmer earning RMB 300,000 a year who accumulated RMB 500,000.
Execution path:
- Month 1: bought an aggressive portfolio (CSI 500 + Nasdaq 100 + Hang Seng Tech).
- Years 1-5: a U.S. bull market; the Nasdaq surged; gains accelerated.
- Years 6-10: returns doubled; total assets reached RMB 1,300,000, a profit of RMB 800,000.
- Key factor: choosing high-growth markets (U.S. tech) and holding long term.
Case 4: Lao Chen, an Entrepreneur — RMB 1,000,000 Principal, Earned RMB 3,000,000 in 15 Years
Background: an entrepreneur who accumulated RMB 1,000,000.
Execution path:
- Month 1: bought a globally allocated portfolio (A-shares + U.S. stocks + Hong Kong stocks + gold).
- Years 1-15: dynamic rebalancing every year; 12% annualized return.
- Year 15: total assets of RMB 4,000,000, a profit of RMB 3,000,000.
- Key factor: global allocation + dynamic rebalancing to maximize compounding.
Case 5: A Beginner Investor — RMB 100,000 Principal, Earned RMB 30,000 in 3 Years
Background: a beginner who wanted to test the waters of investing.
Execution path:
- Month 1: bought CSI 300 (RMB 100,000).
- Year 1: the market fell; lost 20%.
- Years 2-3: the market recovered; total assets of RMB 130,000, a profit of RMB 30,000.
- Key factor: short-term volatility is normal; returns appear after 3+ years.
Case 6: An Index Fund Master — RMB 2,000,000 Principal, Earned RMB 10,000,000 in 20 Years
Background: a seasoned investor who understands asset allocation.
Execution path:
- Month 1: bought a global index fund portfolio (A-shares 30% + U.S. stocks 40% + Hong Kong stocks 10% + emerging markets 10% + gold 10%).
- Years 1-20: dynamic rebalancing every year; 13% annualized return.
- Year 20: total assets of RMB 12,000,000, a profit of RMB 10,000,000.
- Key factor: global allocation + annual rebalancing + ultra-long-term holding.
📊 The complete case library can be viewed at the DigitalMarket.World case study library.
八、Asset Allocation and Dynamic Rebalancing
8.1 4 Asset Allocation Strategies
Strategy 1: Core + Satellite (most recommended)
Core (70%): CSI 300 + S&P 500 (stable)
Satellite (30%): Nasdaq 100 + Hang Seng Tech (high growth)
Strategy 2: Global Balanced
China (40%) + U.S. (40%) + Other (20%)
Strategy 3: Conservative
CSI 300 (40%) + Bond funds (40%) + Gold (20%)
Strategy 4: Aggressive
Nasdaq 100 (50%) + CSI 500 (30%) + Hang Seng Tech (20%)
8.2 Dynamic Rebalancing
Why rebalance?
- Different markets rise and fall differently, so your allocation weights drift from target.
- Rebalancing is essentially "sell high, buy low" — sell what has risen a lot and buy what has risen less.
- Doing it once at the end of each year is enough.
Rebalancing steps:
- Check each fund's weight (e.g., CSI 300 rose from 50% to 60%).
- Sell the overweight portion (sell 10% of your CSI 300).
- Buy the underweight portion (buy 10% of your S&P 500).
- Restore the target ratio (50%/50%).
📝 A complete rebalancing tutorial is available in the DigitalMarket.World tools list.
九、Pitfall Guide: 10 Mistakes Every Beginner Must Know
- ❌ Chasing rises and panic-selling dips → buying when prices rise and selling when they fall (with index funds you should add to your position when they fall).
- ❌ Trading too frequently → index funds need long-term holding (5-10+ years); frequent trading adds costs.
- ❌ Choosing high-fee funds → choose ETFs (fees of 0.01%-0.03%), not active funds (fees of 1.5%).
- ❌ Investing in only one index → concentrated risk; a portfolio of 2-3 funds is recommended.
- ❌ Taking profits too early → index funds need 5-10+ years; taking profit after 1-2 years yields too little.
- ❌ Investing with borrowed money → index funds should be bought with spare cash that won't affect your livelihood.
- ❌ Panic-selling when the market falls → that's exactly when you should add to your position (cheap shares).
- ❌ Neglecting rebalancing → rebalance once at the end of each year to maintain your asset allocation.
- ❌ Ignoring inflation → increase your investment amount every year to fight inflation.
- ❌ Checking your account too often → check once a quarter, not every day (it invites anxiety).
十、FAQ
Q1: Is RMB 100,000 in principal enough?
A: RMB 100,000 is a perfectly good starting point. The key is long-term persistence — after 10 years, RMB 100,000 becomes RMB 260,000.
Q2: When is the best time to buy?
A: Index funds don't require market timing; you can buy at any time. If you have RMB 100,000 of spare cash, buy it in one lump sum. If you have a monthly surplus, set up DCA.
Q3: Should I sell when the market crashes?
A: No. A market crash is the time to add to your position (cheap shares).
Q4: Do I need to watch the market?
A: No. The core of index investing is "buy and hold"; checking once a quarter is enough.
Q5: Are index funds risky?
A: Yes. Over the short term (1-2 years) you can lose 20-30%, but over the long term (5-10 years) losses are unlikely.
十一、30-Day Action Checklist
Week 1: Learn + Open an Account
- [ ] Learn how index funds work (risk diversification + long-term compounding)
- [ ] Open a securities account (recommended: Huatai / Eastmoney)
- [ ] Or download Alipay / Tiantian Fund
- [ ] Complete real-name verification + link a bank card
Week 2: Choose Funds + Buy
- [ ] Decide your portfolio (e.g., CSI 300 + S&P 500)
- [ ] Compare fund fees (choose the lowest-fee ETF)
- [ ] Buy in one lump sum (if you have spare cash) or set up DCA
- [ ] Confirm the purchase
Week 3: Mindset Building
- [ ] Set a reminder (check once a quarter)
- [ ] Forget the account and get on with work/life
- [ ] Set aside an emergency fund (for urgent living expenses)
- [ ] Make a long-term plan (hold for 5-10 years)
Week 4: Review + Optimize
- [ ] Check that your purchases went through
- [ ] Review your fund holdings
- [ ] Set an annual year-end rebalancing reminder
- [ ] Draft next year's investment plan
🎯 Summary
Long-term index fund investing is the ultimate wealth-building approach recommended by Buffett — the lowest fees and the highest long-term returns.
Key points:
- ✅ Lowest fees: ETF fees of 0.01%-0.03%, far below active funds
- ✅ Beats 90% of active funds: 92% of active funds can't beat the index
- ✅ Risk diversification: one index fund equals several hundred stocks
- ✅ Long-term compounding: hold for 5-10 years at 10-12% annualized
Take action now: 👉 DigitalMarket.World
Complete resources:
- 📚 Index fund database
- 🛠️ Return calculator
- 📊 Valuation data
- 💰 Asset allocation templates
- 📝 Dynamic rebalancing tutorial
Start your index fund journey today!
Disclaimer: This article is based on historical data and real cases and does not constitute investment advice. Markets carry risk; invest with caution.
Data sources: DigitalMarket.World
Author: DigitalMarket.World | August 2025
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