MAA vs UDR: Correlation
Measured on weekly returns over the past three years, Mid-America Apartment Communities (MAA) and UDR, Inc. (UDR) carry a correlation of 0.89, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MAA and UDR?
On 3 years of weekly data the MAA/UDR correlation comes out at 0.89, very strong, meaning they move nearly in lockstep. Little has changed lately, as the 1-year reading of 0.89 lands near the 3-year figure. The 5-year figure is 0.89, and annualized covariance runs at 380.2 %².
In MAA's tracked universe of 31 assets, UDR sits right near the top at #2. The trailing year gives UDR the advantage: -6.6% versus -0.6%, a 6.0-point spread. Stability stands out here, with the rolling one-year correlation confined to 0.80 through 0.92.
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.
MAA vs UDR: side by side
| MAA (Mid-America Apartment Communities) | UDR (UDR, Inc.) | |
|---|---|---|
| 1-year return | -6.6% | -0.6% |
| 5-year return | -19.3% | -15.5% |
| Volatility (ann.) | 20.3% | 21.1% |
| Beta vs S&P 500 | 0.49 | 0.54 |
| Max drawdown (3Y) | -26.4% | -24.9% |
| Market cap | $15.3B | $13.6B |
| P/E (trailing) | 37.7 | 23.9 |
| Dividend yield | 4.63% | 4.56% |
| Sector / category | Real Estate | Real Estate |
Year-by-year returns
| Year | MAA | UDR |
|---|---|---|
| 2022 | -29.7% | -33.4% |
| 2023 | -11.1% | +3.1% |
| 2024 | +19.9% | +18.3% |
| 2025 | -6.4% | -11.8% |
| 2026 | -4.0% | +4.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MAA and UDR good diversifiers for each other?
Not really. At 0.89, the two trade almost as one position, and owning both buys little extra protection.
FAQ
What is the correlation between MAA and UDR?
The MAA/UDR correlation stands at 0.89 on a 3-year window (1 year: 0.89, 5 years: 0.89), computed from weekly returns as of 2026-08-27.
Is UDR a good diversifier for MAA?
Not really. At 0.89, the two trade almost as one position, and owning both buys little extra protection.
What does a correlation of 0.89 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/maa-vs-udr.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/maa-vs-udr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: MAA correlations · UDR correlations
