FLYE vs XFOR: Correlation
Fly-E Group, Inc. (FLYE) and X4 Pharmaceuticals, Inc. (XFOR) show a negative relationship: their 3-year correlation of weekly returns is -0.20.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are FLYE and XFOR?
On 3 years of weekly data the FLYE/XFOR correlation comes out at -0.20, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.24) runs above the 3-year figure (-0.20). The 5-year figure is n/a, and annualized covariance runs at -3985.6 %².
Within FLYE's tracked universe of 44 assets, XFOR comes in at #19 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months XFOR outperformed by 89.0 percentage points (-89.0% for FLYE against +0.0% for XFOR).
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.
FLYE vs XFOR: side by side
| FLYE (Fly-E Group, Inc.) | XFOR (X4 Pharmaceuticals, Inc.) | |
|---|---|---|
| 1-year return | -89.0% | +0.0% |
| 5-year return | n/a | -97.2% |
| Volatility (ann.) | 153.0% | 121.6% |
| Beta vs S&P 500 | 1.73 | 1.66 |
| Max drawdown (3Y) | -99.8% | -96.8% |
| Market cap | – | $0.4B |
| P/E (trailing) | – | 2.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | FLYE | XFOR |
|---|---|---|
| 2022 | – | -56.6% |
| 2023 | – | -15.5% |
| 2024 | – | -12.5% |
| 2025 | -92.1% | -81.8% |
| 2026 | -74.4% | +5.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are FLYE and XFOR good diversifiers for each other?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between FLYE and XFOR?
Using weekly returns as of 2026-08-27: -0.20 over 3 years, with 0.24 over the last year and n/a over 5 years.
Is XFOR a good diversifier for FLYE?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.20 mean?
A reading of -0.20 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/flye-vs-xfor.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/flye-vs-xfor/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: FLYE correlations · XFOR correlations
