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Correlation
of % moves
-31%
In sync
of periods
32%
History
daysdays · through 2026-06-11
103
These move in the same direction about 32% of the time
Their swing sizes only faintly mirror each other (~10% of the pattern is shared).
Strong enough to use as a signal — check the stability and regime notes below before relying on it.
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
Slipping looser
The recent pattern is looser than its long-run baseline — keep an eye on whether this sticks.
Tighter in drawdowns
The relationship is stronger when both prices are falling than when both are rising — typical risk-off behaviour.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
32.4%
Headline metric
Movement correlation(i)
-31%
Based on % moves
95% CI
-48% → -12%
Likely range of correlation
Pipeline
Pipeline Summary
103 paired data points survived the daily window.
Raw input
1,255
103
Normalized
1,255
103
Prepared
1,255
103
Aligned
103
103
Invalid removed
R²(i)
9.7%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points
103
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
-31%
No shift — both series at their actual dates.
102 overlapping points at this shift
Baseline
-31%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-31%
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
+2%
22 periods · Return correlation when both series rose
Both Falling
-34%
11 periods · Return correlation when both series fell
Diverging
-54%
69 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,152
A: 1152 / B: 0
Series A
Western Digital Corp. (WDC)
WDC
Stock · 1,255 raw → 1,255 prepared
Series B
Marsh (MRSH)
MRSH
Stock · 103 raw → 103 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
-0.1207
Linear regression slope.
Intercept
0.0002
Linear regression intercept.
Saved last month · ID: stock-mrsh_stock-wdc_daily_5y