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Correlation
of % moves
-33%
In sync
of periods
38%
History
daysdays · through 2026-05-28
93
These move in the same direction about 38% of the time
Their swing sizes only faintly mirror each other (~11% 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.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
38.0%
Headline metric
Movement correlation(i)
-33%
Based on % moves
95% CI
-51% → -14%
Likely range of correlation
Pipeline
Pipeline Summary
93 paired data points survived the daily window.
Raw input
93
1,207
Normalized
93
1,207
Prepared
93
1,207
Aligned
93
93
Invalid removed
R²(i)
11.2%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points
93
Usable
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
-33%
No shift — both series at their actual dates.
92 overlapping points at this shift
Baseline
-33%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-33%
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
+37%
22 periods · Return correlation when both series rose
Both Falling
-32%
13 periods · Return correlation when both series fell
Diverging
-59%
57 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,114
A: 0 / B: 1114
Series A
Marsh (MRSH)
MRSH
Stock · 93 raw → 93 prepared
Series B
Coherent Corp. (COHR)
COHR
Stock · 1,207 raw → 1,207 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
-0.9163
Linear regression slope.
Intercept
0.0064
Linear regression intercept.
Saved 3 weeks ago · ID: stock-cohr_stock-mrsh_daily_5y