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Correlation
of % moves
+21%
In sync
of periods
61%
History
daysdays · through 2026-07-09
1,011
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
Decouples in drawdowns
The relationship weakens when both prices are falling — don't count on this pair as a hedge under stress.
Advanced
Statistics
In sync(i)
61%
Headline metric
Movement correlation(i)
+21%
Based on % moves
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
1,011 paired data points survived the daily window.
Raw input
1,254
1,011
Normalized
1,254
1,011
Prepared
1,254
1,011
Aligned
1,011
1,011
Invalid removed
5%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
1,010
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
+21%
No shift — both series at their actual dates.
1,010 overlapping points at this shift
Baseline
+21%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+21%
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
+25%
74 periods · Return correlation when both series rose
Both Falling
-1%
70 periods · Return correlation when both series fell
Diverging
-21%
47 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
243
A: 243 / B: 0
Series A
Vertex Pharmaceuticals Inc (VRTX)
VRTX
Stock · 1,254 raw → 1,254 prepared
Series B
Elevance Health, Inc. (ELV)
ELV
Stock · 1,011 raw → 1,011 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
7
Estimated crossover points between normalized spreads.
Slope
0.2215
Linear regression slope.
Intercept
-0.0002
Linear regression intercept.
Saved 3 months ago · ID: stock-elv_stock-vrtx_daily_5y