BDMD vs QQQ: Correlation
Baird Medical Investment Holdings Ltd (BDMD) and Invesco QQQ Trust (QQQ) show a near-zero relationship: their 3-year correlation of weekly returns is -0.03.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BDMD and QQQ?
On 3 years of weekly data the BDMD/QQQ correlation comes out at -0.03, near zero, meaning they move largely independently. Lately the two have moved closer together, with the 1-year correlation at 0.13 versus -0.03 over 3 years. The 5-year figure is -0.02, and annualized covariance runs at -114.0 %².
By 3-year correlation, QQQ places #9 of the 15 assets tracked against BDMD. The last year tells two different stories: QQQ led by 81.2 percentage points, -54.9% for BDMD against +26.3% for QQQ. Risk is not evenly split, since BDMD carries 9.6 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.
BDMD vs QQQ: side by side
| BDMD (Baird Medical Investment Holdings Ltd) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | -54.9% | +26.3% |
| 5-year return | -88.5% | +95.4% |
| Volatility (ann.) | 187.8% | 19.6% |
| Beta vs S&P 500 | -0.54 | 1.28 |
| Max drawdown (3Y) | -93.6% | -22.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.44% |
| Expense ratio | – | 0.18% |
| Assets under management | – | $452.8B |
| Sector / category | US Listed | ETF · US Growth & Tech |
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 | BDMD | QQQ |
|---|---|---|
| 2022 | +4.1% | -32.6% |
| 2023 | +4.4% | +54.9% |
| 2024 | -29.0% | +25.6% |
| 2025 | -82.1% | +20.8% |
| 2026 | -18.4% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BDMD and QQQ good diversifiers for each other?
Yes. With a correlation of -0.03, BDMD and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BDMD and QQQ?
Using weekly returns as of 2026-08-27: -0.03 over 3 years, with 0.13 over the last year and -0.02 over 5 years.
Is QQQ a good diversifier for BDMD?
Yes. With a correlation of -0.03, BDMD and QQQ have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.03 mean?
A reading of -0.03 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bdmd-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bdmd-vs-qqq/)
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Related comparisons
Hubs: BDMD correlations · QQQ correlations
