QQQ vs TCMD: Correlation
Measured on weekly returns over the past three years, Invesco QQQ Trust (QQQ) and Tactile Systems Technology, Inc. (TCMD) carry a correlation of 0.13, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are QQQ and TCMD?
Over the past 3 years, QQQ and TCMD moved with a correlation of 0.13, which is weak. The past 12 months show a weaker link (-0.07) than the 3-year average (0.13). Over 5 years the correlation is 0.30, and the annualized covariance of weekly returns is 160.3 %².
Within QQQ's tracked universe of 4755 assets, TCMD comes in at #3592 by 3-year correlation. Correlation aside, the last 12 months split them widely, with TCMD ahead by 49.4 points (+26.3% versus +75.7%). Note the risk asymmetry: TCMD runs 3.2 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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 TCMD: side by side
| QQQ (Invesco QQQ Trust) | TCMD (Tactile Systems Technology, Inc.) | |
|---|---|---|
| 1-year return | +26.3% | +75.7% |
| 5-year return | +95.4% | -47.2% |
| Volatility (ann.) | 19.6% | 63.6% |
| Beta vs S&P 500 | 1.28 | 0.87 |
| Max drawdown (3Y) | -22.8% | -51.8% |
| Market cap | – | $0.5B |
| P/E (trailing) | – | 22.0 |
| Dividend yield | 0.44% | 0.00% |
| Expense ratio | 0.18% | – |
| Assets under management | $452.8B | – |
| Sector / category | ETF · US Growth & Tech | US Listed |
QQQ is a Large Growth fund from Invesco: $452.8B under management, 104 holdings, a 0.18% expense ratio, a 0.44% trailing dividend yield.
Year-by-year returns
| Year | QQQ | TCMD |
|---|---|---|
| 2022 | -32.6% | -39.7% |
| 2023 | +54.9% | +24.6% |
| 2024 | +25.6% | +19.8% |
| 2025 | +20.8% | +69.3% |
| 2026 | +17.7% | -20.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are QQQ and TCMD good diversifiers for each other?
Yes. With a correlation of 0.13, QQQ and TCMD have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between QQQ and TCMD?
As of 2026-08-27, the correlation of weekly returns between QQQ and TCMD is 0.13 over 3 years, -0.07 over 1 year and 0.30 over 5 years.
Is TCMD a good diversifier for QQQ?
Yes. With a correlation of 0.13, QQQ and TCMD have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.13 mean?
On the −1 to +1 scale, 0.13 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-tcmd.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/qqq-vs-tcmd/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: QQQ correlations · TCMD correlations
