AIFF vs ZD: Correlation
Firefly Neuroscience, Inc. (AIFF) and Ziff Davis, Inc. (ZD) show a moderate relationship: their 3-year correlation of weekly returns is 0.45.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AIFF and ZD?
On 3 years of weekly data the AIFF/ZD correlation comes out at 0.45, moderate. The past 12 months show a tighter link (0.69) than the 3-year average (0.45). The 5-year figure is 0.35, and annualized covariance runs at 4450.5 %².
Within AIFF's tracked universe of 15 assets, ZD comes in at #5 by 3-year correlation. The last year tells two different stories: ZD led by 106.6 percentage points, -58.9% for AIFF against +47.7% for ZD. Risk is not evenly split, since AIFF 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.
AIFF vs ZD: side by side
| AIFF (Firefly Neuroscience, Inc.) | ZD (Ziff Davis, Inc.) | |
|---|---|---|
| 1-year return | -58.9% | +47.7% |
| 5-year return | -98.8% | -53.5% |
| Volatility (ann.) | 190.4% | 52.4% |
| Beta vs S&P 500 | 1.78 | 1.08 |
| Max drawdown (3Y) | -95.9% | -62.6% |
| Market cap | – | $1.9B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AIFF | ZD |
|---|---|---|
| 2022 | -90.3% | -28.6% |
| 2023 | -64.8% | -15.1% |
| 2024 | -47.7% | -19.1% |
| 2025 | -66.8% | -35.3% |
| 2026 | +22.7% | +58.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AIFF and ZD good diversifiers for each other?
Reasonably. At 0.45, AIFF and ZD keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between AIFF and ZD?
As of 2026-08-27, the correlation of weekly returns between AIFF and ZD is 0.45 over 3 years, 0.69 over 1 year and 0.35 over 5 years.
Is ZD a good diversifier for AIFF?
Reasonably. At 0.45, AIFF and ZD keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.45 mean?
A reading of 0.45 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/aiff-vs-zd.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aiff-vs-zd/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AIFF correlations · ZD correlations
