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Correlation
of % moves
+4%
In sync
of periods
53%
History
daysdays · through 2026-05-28
1,207
These move in the same direction about 53% of the time
Their swing sizes barely line up — almost no shared pattern.
Roughly random — these don't track each other in a meaningful way.
On a log scale so equal % moves take equal vertical space — best when one series has grown much faster than the other.
What to Watch
CAH moves ~5 days before COHR
Watch CAH for an early read on COHR.
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)
52.8%
Headline metric
Movement correlation(i)
+4%
Based on % moves
95% CI
-1% → +10%
Likely range of correlation
Pipeline
Pipeline Summary
1,207 paired data points survived the daily window.
Raw input
1,207
1,254
Normalized
1,207
1,254
Prepared
1,207
1,254
Aligned
1,207
1,207
Invalid removed
R²(i)
0.2%
Variance explained
Significance
n.s.
Statistical confidence
Data points
1,207
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
-5 days
Correlation at this shift
+10%
+5% stronger than no-shift baseline
Cardinal Health, Inc. (CAH) shifted 5 days later. Reads: "Does Coherent Corp. (COHR) today line up with Cardinal Health, Inc. (CAH) 5 days ago?"
1,195 overlapping points at this shift
Baseline
+4%
No-shift correlation, matching the main time-series chart above.
Peak shift
-5 days
+10%
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
+46%
62 periods · Return correlation when both series rose
Both Falling
+54%
58 periods · Return correlation when both series fell
Diverging
-44%
33 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
47
A: 0 / B: 47
Series A
Coherent Corp. (COHR)
COHR
Stock · 1,207 raw → 1,207 prepared
Series B
Cardinal Health, Inc. (CAH)
CAH
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
6
Estimated crossover points between normalized spreads.
Slope
0.0188
Linear regression slope.
Intercept
0.0008
Linear regression intercept.
Saved 3 weeks ago · ID: stock-cah_stock-cohr_daily_5y