QQQ vs STX: Correlation
Measured on weekly returns over the past three years, Invesco QQQ Trust (QQQ) and Seagate Technology (STX) carry a correlation of 0.56, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are QQQ and STX?
Across a 3-year window, the weekly returns of QQQ and STX correlate at 0.56, moderate. The relationship has been stable: the 1-year correlation (0.54) sits close to the 3-year figure. Stretching to 5 years gives 0.57, with an annualized covariance of 560.2 %².
By 3-year correlation, STX places #184 of the 4755 assets tracked against QQQ. Correlation aside, the last 12 months split them widely, with STX ahead by 384.5 points (+26.3% versus +410.8%). Across three years, the rolling one-year figure varied moderately, from 0.47 to 0.72. Risk is not evenly split, since STX carries 2.6 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
QQQ vs STX: side by side
| QQQ (Invesco QQQ Trust) | STX (Seagate Technology) | |
|---|---|---|
| 1-year return | +26.3% | +410.8% |
| 5-year return | +95.4% | +1032.5% |
| Volatility (ann.) | 19.6% | 51.3% |
| Beta vs S&P 500 | 1.28 | 1.97 |
| Max drawdown (3Y) | -22.8% | -40.0% |
| Market cap | – | $192.0B |
| P/E (trailing) | – | 61.0 |
| Dividend yield | 0.44% | 0.35% |
| Expense ratio | 0.18% | – |
| Assets under management | $452.8B | – |
| Sector / category | ETF · US Growth & Tech | Information Technology |
On the fund side, QQQ sits in the Large Growth category at Invesco, with $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | QQQ | STX |
|---|---|---|
| 2022 | -32.6% | -51.4% |
| 2023 | +54.9% | +69.1% |
| 2024 | +25.6% | +4.1% |
| 2025 | +20.8% | +225.3% |
| 2026 | +17.7% | +208.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
STX represents 0.84% of QQQ's portfolio, so part of any move in QQQ is STX itself, and the correlation between them is partly mechanical.
Are QQQ and STX good diversifiers for each other?
To a limited degree. At 0.56 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between QQQ and STX?
As of 2026-08-27, the correlation of weekly returns between QQQ and STX is 0.56 over 3 years, 0.54 over 1 year and 0.57 over 5 years.
Is STX a good diversifier for QQQ?
To a limited degree. At 0.56 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.56 mean?
On the −1 to +1 scale, 0.56 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/qqq-vs-stx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/qqq-vs-stx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: QQQ correlations · STX correlations
