Do VOO and QQQ hold the same companies?

At least 54% of each fund is the same holding as the other, led by NVDA, AAPL, GOOGL. This measurement names the companies behind 99% of the money, so the real overlap is at least this and cannot be smaller.

Do VOO and QQQ fall together?

Measured from 1999-03-10 to 2026-11-06, the worst fall on record was 55% for VOO and 83% for QQQ. Held half and half, the worst fall was 69%. Over the same window, the two swing like a single bet.

What changes if both are held?

A half-and-half mix had volatility 22% over this window, against 19% for VOO and 27% for QQQ, and its worst fall was 69%. Inside that mix, QQQ carries 59% of the risk for half of the money.

How are these figures measured?

From daily closing prices supplied by Yahoo Finance, over 1999-03-10 to 2026-11-06 — 6,960 trading days, in USD — by the same engine that serves the app. Every figure describes what has already happened: nothing here forecasts returns or losses, and nothing here is advice.

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How much of two funds is the same company, and how far each one fell.

How much of VOO and QQQ is the same?

At least 54% of each fund is the same holding as the other: the same companies at the same weight. In a half-and-half mix, the two swing like a single bet.

Daily prices, 10 Mar 1999 to 6 Nov 2026. What happened, not a forecast.

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Already hold VOO? What adding QQQ changes →

Measured over 27 years of daily prices: what each one brings, and what changes when both are held.

Measured on 2026-11-06

The companies both of them hold

Company	Share of a half-and-half mix	Through
NVDA	8.0%	QQQ 4.3% · VOO 3.8%
AAPL	7.0%	QQQ 3.7% · VOO 3.3%
GOOGL	6.0%	QQQ 3.0% · VOO 2.9%
MSFT	5.2%	QQQ 3.0% · VOO 2.1%
AMZN	4.0%	QQQ 2.2% · VOO 1.8%
MU	3.4%	QQQ 2.4% · VOO 1.0%
AVGO	2.8%	QQQ 1.4% · VOO 1.4%
AMD	2.4%	QQQ 1.7% · VOO 0.7%
LLY	0.7%	VOO 0.7% — held through one of the two only
BRK-B	0.7%	VOO 0.7% — held through one of the two only
JPM	0.6%	VOO 0.6% — held through one of the two only
SPCX	0.6%	QQQ 0.6% — held through one of the two only

Overlap is counted company by company: the smaller of its two weights, added up. This measurement names the companies behind 99% of the money; the rest is out of its sight. The share above is what is shared within that part: it is a floor, never the total overlap.

The worst falls on record

Holding	Worst fall	Volatility
VOO	55%	19%
QQQ	83%	27%
Both, half and half	69%	22%

Measured on the same window for all three rows, so they can be read against each other. A fall is peak to trough on daily closes.

Where the risk sits in a half-and-half mix

Holding	Money	Risk	Ratio
QQQ	50%	59%	1.18
VOO	50%	41%	0.82

The reading, in full

PORTFOLIO: VOO + QQQ
1999-03-10 to 2026-11-06 · 6,960 trading days · USD

2 holdings.
Together they swing like a single bet.

QQQ carries 59% of the risk on its own.
Volatility 22% · worst fall on record 69%.
Risk 21% → 17% over the last year, mostly because the holdings themselves got quieter.

Descriptive. No forecast, no advice. Every figure above is measured over the window named at the top.
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Questions people ask about this pair

Do VOO and QQQ hold the same companies?: At least 54% of each fund is the same holding as the other, led by NVDA, AAPL, GOOGL. This measurement names the companies behind 99% of the money, so the real overlap is at least this and cannot be smaller.
Do VOO and QQQ fall together?: Measured from 1999-03-10 to 2026-11-06, the worst fall on record was 55% for VOO and 83% for QQQ. Held half and half, the worst fall was 69%. Over the same window, the two swing like a single bet.
What changes if both are held?: A half-and-half mix had volatility 22% over this window, against 19% for VOO and 27% for QQQ, and its worst fall was 69%. Inside that mix, QQQ carries 59% of the risk for half of the money.
How are these figures measured?: From daily closing prices supplied by Yahoo Finance, over 1999-03-10 to 2026-11-06 — 6,960 trading days, in USD — by the same engine that serves the app. Every figure describes what has already happened: nothing here forecasts returns or losses, and nothing here is advice.

What this does not say

Every figure is measured on past daily prices over the window below. It is not a forecast of returns or losses.
VOO before 2010-09-09 is measured on the daily moves of VFINX, an older fund on the same index (S&P 500), from 1990-01-02. Those years describe the older fund, not VOO's own record. Older crises may still lie outside the window.
The overlap is measured through published holdings only, and is a floor: the real figure is at least this, and cannot be smaller.
Which of two funds to hold depends on things not measured here — what you already own, costs at your broker, and your own tax position.

Measure it with what you actually hold

Change the split, add the rest of your portfolio, see what the pair does inside it: same engine, nothing saved on our side.

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Build a portfolio with these twoBoth on the measure page, half and half: change them into yours.Already hold VOO?What adding QQQ changes in it.Another pairEvery comparison measured here.

Measured 1999-03-10 to 2026-11-06 over 6,960 trading days, in USD, from Yahoo Finance prices. Descriptive: this page reports what these two funds have done and how much of them is the same holding. It does not forecast returns or losses, it does not say which to hold, and it is not advice. How every figure is measured. Terms and privacy: /terms. If a figure looks wrong: [email protected].