DCA Into Nasdaq 100 at the 2000 Dot-Com Peak: A 26-Year Backtest

Cui Kevin — Sat, 03 Oct 2026 07:59:22 +0000

DCA Into Nasdaq 100 at the 2000 Dot-Com Peak: A 26-Year Backtest

What happens if you start dollar-cost averaging (DCA) into the Nasdaq-100 at the worst possible moment—the peak of the dot-com bubble in March 2000?

Most people assume it would be a disaster. The data says otherwise.

The backtest setup

I ran a DCA backtest on QQQ (Nasdaq-100 ETF) with the following parameters:

Asset: QQQ
Period: March 1, 2000 – August 31, 2026
Frequency: Monthly
Amount: $1,000 per contribution
Strategy: Regular DCA (fixed amount)
Initial lump sum: $0
Dividends: Excluded
Fees: Excluded

The starting point is deliberate—March 2000 is the single worst entry point in Nasdaq-100 history. If DCA can survive this, it can survive almost anything.

The results

Metric	Value
Total Invested	$318,000.00
Final Value	$1,943,131.91
Total Return	511.05%
Annualized Return	11.77%
Maximum Drawdown	40.11%

Even starting from the absolute peak of the dot-com bubble, 26 years of consistent DCA produced a 5.1x return on invested capital.

Why the 2000 peak was so brutal

From March 2000 to October 2002, the Nasdaq-100 fell 82.9%—from 5,048 to 1,114 in just 19 months.

Metric	Value
Bubble peak	March 24, 2000 — 4,816 (closing)
Trough	October 2002 — 1,114
Max drawdown	-82.9%
Decline duration	~19 months
Recovery to peak	~15 years (back to 2000 level in 2015)

If you had invested a lump sum in March 2000, you would have lost 82.9% of your capital and waited until 2015 to break even. That's 15 years of waiting.

This is why starting DCA at the 2000 peak is the ultimate stress test.

How DCA changed the outcome

The equity curve shows cumulative invested capital rising in a straight line, while portfolio value stayed below total invested for years during 2000–2002. At the worst point, the account was down 40.11%.

But DCA's "buy more when low" mechanism kept working. As the Nasdaq fell 82.9%, each monthly contribution bought more shares at extremely low prices. Those cheap shares paid off during the recovery.

By 2026, the account had not only recovered but delivered a 511.05% total return.

DCA vs. lump sum: the real difference

	Lump sum (March 2000)	DCA (March 2000 – Aug 2026)
Break-even time	~15 years (2015)	Positive return within ~10 years
Max drawdown	-82.9%	-40.11% (account level)
Final outcome	Break-even, then gains	$1.94M on $318K invested

DCA shortened the break-even period from 15 years to roughly 10 years and cut the maximum account drawdown in half.

Comparison with S&P 500

If you had started DCA into the S&P 500 (SPY) in March 2000, the ride would have been smoother.

Dimension	S&P 500	Nasdaq-100
Bubble max drawdown	~-49%	-82.9%
Recovery time	~7 years	~15 years
Volatility	Moderate	Extreme
DCA experience	Manageable losses	Severe psychological test

The Nasdaq-100's decline was 1.7x deeper than the S&P 500's, and its recovery took more than twice as long. Starting DCA into the Nasdaq at the 2000 peak required enduring years of deeper losses and far greater psychological stress.

How long does "long-term" actually mean?

This is the core question.

Starting DCA into the Nasdaq-100 from the 2000 peak, "turning positive" and "truly breaking even" are two different things:

Turning positive: cumulative return becomes positive.
Truly breaking even: total account value exceeds total invested capital.

Some backtests show that starting daily DCA of $50 into the Nasdaq from the 2000 peak, the account turns positive in under 4 years. If you DCA for 10 years from the 2000 peak, the final return is roughly +30%.

But if you had invested a lump sum in 2000, you would have waited until 2015 to break even—15 years.

This is the biggest difference between DCA and lump-sum investing: DCA uses continuous contributions to average down cost, shortening "15 years to break even" into "positive returns within 10 years."

One-line summary

Nasdaq-100 DCA, even starting from the historic peak of the 2000 dot-com bubble, after 26 years of consistent investing, still recovered and turned a profit: total return 511.05%, annualized 11.77%, maximum drawdown 40.11%.

Data for reference only. Not investment advice.

👉 Run the same backtest yourself on DCA Guide

DEV Community: Cui Kevin

DCA Into Nasdaq 100 at the 2000 Dot-Com Peak: A 26-Year Backtest

DCA Into Nasdaq 100 at the 2000 Dot-Com Peak: A 26-Year Backtest

The backtest setup

The results

Why the 2000 peak was so brutal

How DCA changed the outcome

DCA vs. lump sum: the real difference

Comparison with S&P 500

How long does "long-term" actually mean?

One-line summary