Correlation Analysis
Apple Inc. vs Equity Residential
AAPL vs EQR
-0.300
Light inverse
When one moves up, the other tends to move down.
Apple Inc.
↗AAPL
Apple is among the largest companies in the world, with a broad portfolio of hardware and software products targeted at consumers and businesses. Apple's iPhone makes up a majority of the firm sales, and Apple's other products like Mac, iPad, and Watch are designed around the iPhone as the focal point of an expansive software ecosystem. Apple has progressively worked to add new applications, like streaming video, subscription bundles, and augmented reality. The firm designs its own software and semiconductors while working with subcontractors like Foxconn and TSMC to build its products and chips. Slightly less than half of Apple's sales come directly through its flagship stores, with a majority of sales coming indirectly through partnerships and distribution.
Market cap 3.8T
Equity Residential
↗EQR
Equity Residential owns a portfolio of 318 apartment communities with over 86,000 units and is developing three additional properties with 935 units. The company focuses on owning large, high-quality properties in the urban and suburban submarkets of Southern California, San Francisco, Washington, D.C., New York, Seattle, and Boston.
Market cap 22.7B · 2,400 employees
Time Series
Rebased to 100
Who Moves First
EQR leads AAPL by 6 days
EQR tends to move before AAPL.
Best correlation after shifting: -0.308 (13 shifts scanned)
Do They Crash Together?
Correlation by Market Regime
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
+0.192
12 periods · Return correlation when both series rose
Both Falling
+0.225
9 periods · Return correlation when both series fell
Diverging
-0.740
14 periods · Return correlation when series moved apart
R-Squared
9.0%
Share of variance in one series explained by the other.
Trend Agreement
60.2%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
p < 0.001
95% CI: [-0.350, -0.249]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired observations survived the daily window.
Raw input
1,254
1,254
Normalized
1,254
1,254
Prepared
1,254
1,254
Aligned
1,254
1,254
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
Apple Inc.
AAPL
Market cap 3.8T
Stock · 1,254 raw → 1,254 prepared
Series B
Equity Residential
EQR
Market cap 22.7B · 2,400 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
17
Estimated crossover points between normalized spreads.
Slope
-0.0680
Linear regression slope.
Intercept
82.5149
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-aapl-vs-stock-eqr-daily-20260408-l399hn