John Bogle (1929–2019) was the founder of Vanguard. In 1976, he launched the Vanguard 500 Index Fund—the first index fund offered to individual investors, tracking the S&P 500.
Wall Street ridiculed it at the time, calling it "Bogle's Folly." Nearly 50 years later, index funds have become one of the largest investment categories globally, and Bogle's ideas have changed the fortunes of tens of millions of ordinary investors.
Bogle's core logic is strikingly simple:
1.The market is the sum of all investors—so the average investor's return isthe market return.
2.Active fund managers charge management and transaction fees; after costs, average returns are mathematically doomed to lag the market.
3.Index funds have near-zero fees, so long-term returns closely track the market.
4.Therefore: Long-term return of an index fund > Long-term return of the average active fund.
This isn't theory—it's a repeatedly verified fact. S&P's annual SPIVA report shows that over a 15-year horizon, roughly 90% of active managers underperform the S&P 500.
Bogle wasn't just the inventor of the index fund; he was also a staunch advocate of dollar-cost averaging. His advice was plainspoken:
"Don't look for the needle in the haystack. Buy the haystack."
Meaning: stop agonizing over stock picking—just buy the entire market via an index. Then keep accumulating through regular contributions.
Time inthe market, not timingthe market: Don't try to predict highs and lows; stay invested.
Costs matter most: Choose the lowest-fee index funds.
Persistence is your edge: Don't stop when the market crashes—actually scale up.
Index DCA in the A-Share Market
Bogle's ideas travel well to China's A-share market. Take the CSI 300 ETF (510300) as an example:
From 2014 to 2024, the CSI 300 went through the 2015 bull run, the 2018 bear, the 2021 "core asset" bubble, and the late-2024 bottom rebound.
A hypothetical ¥1,000 monthly DCA would have deployed ¥120k over 10 years, ending around ¥158k.
XIRR ~5% annualized (based on historical data); long-term DCA returns depend on market path—past performance ≠ future results.
The key: DCA requires no market timing, no stock picking, no screen-watching. For many ordinary investors, index DCA is a low-cost, low-effort approach.
You can use the site's "DCA Master" tool—pick a broad-based ETF like CSI 300 or CSI 500, set a DCA window, and compare fixed-amount DCA, valuation-based DCA, and lump-sum entry over time. It's a way to observe how index DCA behaves using historical data (for reference only).
Disclaimer: This article discusses investment philosophy and historical data only, and does not constitute investment advice.