PUBM vs QNST: Correlation
Measured on weekly returns over the past three years, PubMatic, Inc. (PUBM) and QuinStreet, Inc. (QNST) carry a correlation of 0.50, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PUBM and QNST?
Over the past 3 years, PUBM and QNST moved with a correlation of 0.50, which is moderate. The past 12 months show a tighter link (0.68) than the 3-year average (0.50). Over 5 years the correlation is 0.34, and the annualized covariance of weekly returns is 1460.3 %².
By 3-year correlation, QNST places #6 of the 17 assets tracked against PUBM. Correlation aside, the last 12 months split them widely, with PUBM ahead by 70.3 points (+91.7% versus +21.4%).
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.
PUBM vs QNST: side by side
| PUBM (PubMatic, Inc.) | QNST (QuinStreet, Inc.) | |
|---|---|---|
| 1-year return | +91.7% | +21.4% |
| 5-year return | -40.5% | +6.2% |
| Volatility (ann.) | 61.6% | 47.9% |
| Beta vs S&P 500 | 1.56 | 1.22 |
| Max drawdown (3Y) | -73.9% | -58.0% |
| Market cap | $0.7B | $1.1B |
| P/E (trailing) | – | 14.1 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PUBM | QNST |
|---|---|---|
| 2022 | -62.4% | -21.1% |
| 2023 | +27.3% | -10.7% |
| 2024 | -9.9% | +80.0% |
| 2025 | -39.6% | -37.7% |
| 2026 | +84.3% | +31.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PUBM and QNST good diversifiers for each other?
Only partially. A correlation of 0.50 means PUBM and QNST share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between PUBM and QNST?
Using weekly returns as of 2026-08-27: 0.50 over 3 years, with 0.68 over the last year and 0.34 over 5 years.
Is QNST a good diversifier for PUBM?
Only partially. A correlation of 0.50 means PUBM and QNST share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.50 mean?
A reading of 0.50 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/pubm-vs-qnst.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/pubm-vs-qnst/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: PUBM correlations · QNST correlations
