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Correlation
of % moves
+23%
In sync
of periods
61%
History
daysdays · through 2026-05-22
979
These move in the same direction about 61% of the time
Their swing sizes only faintly line up (~5% of the pattern is shared).
A real but noisy link — useful as context, risky as a standalone signal.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Advanced
Statistics
In sync(i)
60.5%
Headline metric
Movement correlation(i)
+23%
Based on % moves
95% CI
+17% → +29%
Likely range of correlation
Pipeline
Pipeline Summary
979 paired data points survived the daily window.
Raw input
980
1,252
Normalized
980
1,252
Prepared
980
1,252
Aligned
979
979
Invalid removed
R²(i)
5.4%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
979
Deep
Time-Shifted Correlation
See how correlation changes when one series is offset in time. A taller bar at a non-zero shift means the two move together better when one leads the other — that's a potential lead/lag signal.
Correlation by shift
Click a bar to inspect. Range: -6 to 6 days.
Selected shift
No shift
Correlation at this shift
+23%
No shift — both series at their actual dates.
978 overlapping points at this shift
Baseline
+23%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+23%
A non-zero peak suggests one series lines up better when shifted against the other.
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Do They Crash Together?
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
+10%
72 periods · Return correlation when both series rose
Both Falling
-5%
74 periods · Return correlation when both series fell
Diverging
-46%
46 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
274
A: 1 / B: 273
Series A
Elevance Health, Inc. (ELV)
ELV
Stock · 980 raw → 980 prepared
Series B
Biogen Inc. Common Stock (BIIB)
BIIB
Stock · 1,252 raw → 1,252 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
29
Estimated crossover points between normalized spreads.
Slope
0.2556
Linear regression slope.
Intercept
0.0000
Linear regression intercept.
Saved 2 weeks ago · ID: stock-biib_stock-elv_daily_5y