QQQ vs TNDM: Correlation
Invesco QQQ Trust (QQQ) and Tandem Diabetes Care, Inc. (TNDM) show a weak relationship: their 3-year correlation of weekly returns is 0.11.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are QQQ and TNDM?
Over the past 3 years, QQQ and TNDM moved with a correlation of 0.11, which is weak. The link has loosened recently: the 1-year correlation (-0.11) runs below the 3-year figure (0.11). Over 5 years the correlation is 0.25, and the annualized covariance of weekly returns is 159.3 %².
Within QQQ's tracked universe of 4755 assets, TNDM comes in at #3788 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months TNDM outperformed by 48.4 percentage points (+26.3% for QQQ against +74.7% for TNDM). Risk is not evenly split, since TNDM carries 3.6 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 TNDM: side by side
| QQQ (Invesco QQQ Trust) | TNDM (Tandem Diabetes Care, Inc.) | |
|---|---|---|
| 1-year return | +26.3% | +74.7% |
| 5-year return | +95.4% | -80.9% |
| Volatility (ann.) | 19.6% | 71.1% |
| Beta vs S&P 500 | 1.28 | 0.84 |
| Max drawdown (3Y) | -22.8% | -81.1% |
| Market cap | – | $1.5B |
| P/E (trailing) | – | – |
| Dividend yield | 0.44% | 0.00% |
| Expense ratio | 0.18% | – |
| Assets under management | $452.8B | – |
| Sector / category | ETF · US Growth & Tech | US Listed |
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 | TNDM |
|---|---|---|
| 2022 | -32.6% | -70.1% |
| 2023 | +54.9% | -34.2% |
| 2024 | +25.6% | +21.8% |
| 2025 | +20.8% | -39.0% |
| 2026 | +17.7% | -2.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are QQQ and TNDM good diversifiers for each other?
By historical standards, yes. A correlation of 0.11 means the two rarely move for the same reasons.
FAQ
What is the correlation between QQQ and TNDM?
Using weekly returns as of 2026-08-27: 0.11 over 3 years, with -0.11 over the last year and 0.25 over 5 years.
Is TNDM a good diversifier for QQQ?
By historical standards, yes. A correlation of 0.11 means the two rarely move for the same reasons.
What does a correlation of 0.11 mean?
On the −1 to +1 scale, 0.11 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-tndm.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/qqq-vs-tndm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: QQQ correlations · TNDM correlations
