EXTR vs NTCT: Correlation
Extreme Networks, Inc. (EXTR) and NetScout Systems, Inc. (NTCT) show a moderate relationship: their 3-year correlation of weekly returns is 0.44.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EXTR and NTCT?
Across a 3-year window, the weekly returns of EXTR and NTCT correlate at 0.44, moderate. Recent behaviour matches the longer record: 0.36 over 1 year against 0.44 over 3. Stretching to 5 years gives 0.40, with an annualized covariance of 619.1 %².
Among the 11 assets we track against EXTR, NTCT ranks #4 by 3-year correlation. The last year tells two different stories: NTCT led by 51.4 percentage points, +8.0% for EXTR against +59.4% for NTCT. One caveat on sizing: EXTR is 1.5 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
EXTR vs NTCT: side by side
| EXTR (Extreme Networks, Inc.) | NTCT (NetScout Systems, Inc.) | |
|---|---|---|
| 1-year return | +8.0% | +59.4% |
| 5-year return | +112.0% | +42.7% |
| Volatility (ann.) | 46.3% | 30.4% |
| Beta vs S&P 500 | 1.23 | 0.85 |
| Max drawdown (3Y) | -61.5% | -38.4% |
| Market cap | $3.0B | $2.9B |
| P/E (trailing) | 72.6 | 23.5 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | EXTR | NTCT |
|---|---|---|
| 2022 | +16.6% | -1.7% |
| 2023 | -3.7% | -32.5% |
| 2024 | -5.1% | -1.3% |
| 2025 | -0.5% | +24.9% |
| 2026 | +39.5% | +45.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EXTR and NTCT good diversifiers for each other?
Reasonably. At 0.44, EXTR and NTCT keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between EXTR and NTCT?
The EXTR/NTCT correlation stands at 0.44 on a 3-year window (1 year: 0.36, 5 years: 0.40), computed from weekly returns as of 2026-08-27.
Is NTCT a good diversifier for EXTR?
Reasonably. At 0.44, EXTR and NTCT keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/extr-vs-ntct.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/extr-vs-ntct/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: EXTR correlations · NTCT correlations
