SELF vs TDS: Correlation
Global Self Storage, Inc. (SELF) and Telephone and Data Systems, Inc. (TDS) show a moderate relationship: their 3-year correlation of weekly returns is 0.40.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SELF and TDS?
Across a 3-year window, the weekly returns of SELF and TDS correlate at 0.40, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.14 versus 0.40 over 3 years. Stretching to 5 years gives 0.22, with an annualized covariance of 385.1 %².
In SELF's tracked universe of 14 assets, TDS sits right near the top at #3. Correlation aside, the last 12 months split them widely, with SELF ahead by 27.0 points (+10.0% versus -17.0%). Risk is not evenly split, since TDS carries 2.3 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.
SELF vs TDS: side by side
| SELF (Global Self Storage, Inc.) | TDS (Telephone and Data Systems, Inc.) | |
|---|---|---|
| 1-year return | +10.0% | -17.0% |
| 5-year return | +36.6% | +91.9% |
| Volatility (ann.) | 20.6% | 46.7% |
| Beta vs S&P 500 | 0.15 | 0.86 |
| Max drawdown (3Y) | -15.9% | -33.4% |
| Market cap | $0.1B | $3.8B |
| P/E (trailing) | 31.1 | 8.3 |
| Dividend yield | 5.14% | 0.48% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | SELF | TDS |
|---|---|---|
| 2022 | -10.0% | -45.3% |
| 2023 | +0.8% | +86.3% |
| 2024 | +22.0% | +89.0% |
| 2025 | +1.2% | +20.7% |
| 2026 | +13.0% | -19.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SELF and TDS good diversifiers for each other?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between SELF and TDS?
The SELF/TDS correlation stands at 0.40 on a 3-year window (1 year: 0.14, 5 years: 0.22), computed from weekly returns as of 2026-08-27.
Is TDS a good diversifier for SELF?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.40 mean?
On the −1 to +1 scale, 0.40 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/self-vs-tds.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/self-vs-tds/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: SELF correlations · TDS correlations
