IRM vs PHIO: Correlation
How closely do Iron Mountain (IRM) and Phio Pharmaceuticals Corp. (PHIO) trade together? Their weekly returns over three years give a correlation of 0.35, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IRM and PHIO?
Across a 3-year window, the weekly returns of IRM and PHIO correlate at 0.35, moderate. Recent behaviour matches the longer record: 0.42 over 1 year against 0.35 over 3. Stretching to 5 years gives 0.23, with an annualized covariance of 1222.2 %².
Among the 31 assets we track against IRM, PHIO ranks #21 by 3-year correlation. Correlation aside, the last 12 months split them widely, with IRM ahead by 82.9 points (+38.1% versus -44.8%). Note the risk asymmetry: PHIO runs 3.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
IRM vs PHIO: side by side
| IRM (Iron Mountain) | PHIO (Phio Pharmaceuticals Corp.) | |
|---|---|---|
| 1-year return | +38.1% | -44.8% |
| 5-year return | +219.3% | -99.5% |
| Volatility (ann.) | 30.8% | 113.9% |
| Beta vs S&P 500 | 0.96 | 1.91 |
| Max drawdown (3Y) | -39.0% | -96.3% |
| Market cap | $36.5B | – |
| P/E (trailing) | 86.4 | – |
| Dividend yield | 2.78% | 0.00% |
| Sector / category | Real Estate | US Listed |
Year-by-year returns
| Year | IRM | PHIO |
|---|---|---|
| 2022 | -0.1% | -62.8% |
| 2023 | +46.5% | -83.0% |
| 2024 | +54.5% | -73.7% |
| 2025 | -18.2% | -41.7% |
| 2026 | +50.1% | +6.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IRM and PHIO good diversifiers for each other?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between IRM and PHIO?
As of 2026-08-27, the correlation of weekly returns between IRM and PHIO is 0.35 over 3 years, 0.42 over 1 year and 0.23 over 5 years.
Is PHIO a good diversifier for IRM?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.35 mean?
A reading of 0.35 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/irm-vs-phio.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/irm-vs-phio/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IRM correlations · PHIO correlations
