PDM vs QQQ: Correlation
Measured on weekly returns over the past three years, Piedmont Realty Trust, Inc. (PDM) and Invesco QQQ Trust (QQQ) carry a correlation of 0.24, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PDM and QQQ?
On 3 years of weekly data the PDM/QQQ correlation comes out at 0.24, weak. The relationship has been stable: the 1-year correlation (0.19) sits close to the 3-year figure. The 5-year figure is 0.32, and annualized covariance runs at 168.6 %².
Out of 28 assets tracked against PDM, QQQ lands near the bottom at #25. The trailing year gives QQQ the advantage: +16.0% versus +26.3%, a 10.3-point spread. Note the risk asymmetry: PDM runs 1.8 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.
PDM vs QQQ: side by side
| PDM (Piedmont Realty Trust, Inc.) | QQQ (Invesco QQQ Trust) | |
|---|---|---|
| 1-year return | +16.0% | +26.3% |
| 5-year return | -29.9% | +95.4% |
| Volatility (ann.) | 35.3% | 19.6% |
| Beta vs S&P 500 | 0.95 | 1.28 |
| Max drawdown (3Y) | -46.4% | -22.8% |
| Market cap | $1.2B | – |
| 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 | PDM | QQQ |
|---|---|---|
| 2022 | -46.8% | -32.6% |
| 2023 | -14.8% | +54.9% |
| 2024 | +37.2% | +25.6% |
| 2025 | -7.3% | +20.8% |
| 2026 | +16.4% | +17.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PDM and QQQ good diversifiers for each other?
Reasonably. At 0.24, PDM and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between PDM and QQQ?
Using weekly returns as of 2026-08-27: 0.24 over 3 years, with 0.19 over the last year and 0.32 over 5 years.
Is QQQ a good diversifier for PDM?
Reasonably. At 0.24, PDM and QQQ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.24 mean?
On the −1 to +1 scale, 0.24 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/pdm-vs-qqq.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pdm-vs-qqq/)
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Related comparisons
Hubs: PDM correlations · QQQ correlations
