IEX vs NSTS: Correlation
IDEX Corporation (IEX) and NSTS Bancorp, Inc. (NSTS) show a negative relationship: their 3-year correlation of weekly returns is -0.16.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IEX and NSTS?
Across a 3-year window, the weekly returns of IEX and NSTS correlate at -0.16, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.06 lands near the 3-year figure. Stretching to 5 years gives -0.07, with an annualized covariance of -71.0 %².
Among the 40 assets we track against IEX, NSTS ranks #33 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months IEX outperformed by 25.1 percentage points (+43.0% for IEX against +17.9% for NSTS).
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.
IEX vs NSTS: side by side
| IEX (IDEX Corporation) | NSTS (NSTS Bancorp, Inc.) | |
|---|---|---|
| 1-year return | +43.0% | +17.9% |
| 5-year return | +10.5% | +11.4% |
| Volatility (ann.) | 23.3% | 19.0% |
| Beta vs S&P 500 | 0.89 | 0.01 |
| Max drawdown (3Y) | -34.6% | -18.5% |
| Market cap | $17.2B | $0.1B |
| P/E (trailing) | 33.8 | – |
| Dividend yield | 1.23% | 0.00% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | IEX | NSTS |
|---|---|---|
| 2022 | -2.2% | – |
| 2023 | -3.8% | -6.1% |
| 2024 | -2.4% | +24.1% |
| 2025 | -13.7% | +9.7% |
| 2026 | +32.9% | +8.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IEX and NSTS good diversifiers for each other?
Yes: at -0.16, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between IEX and NSTS?
Using weekly returns as of 2026-08-27: -0.16 over 3 years, with -0.06 over the last year and -0.07 over 5 years.
Is NSTS a good diversifier for IEX?
Yes: at -0.16, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.16 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/iex-vs-nsts.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/iex-vs-nsts/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: IEX correlations · NSTS correlations
