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Correlation
of % moves
+30%
In sync
of periods
56%
History
daysdays · through 2026-05-22
90
These move in the same direction about 56% of the time
Their swing sizes only faintly line up (~9% of the pattern is shared).
A faint pattern — interesting as colour, not strong enough to act on alone.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Slipping tighter
The recent pattern is tighter than its long-run baseline — keep an eye on whether this sticks.
Decouples in drawdowns
The relationship weakens when both prices are falling — don't count on this pair as a hedge under stress.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
56.2%
Headline metric
Movement correlation(i)
+30%
Based on % moves
95% CI
+10% → +48%
Likely range of correlation
Pipeline
Pipeline Summary
90 paired data points survived the daily window.
Raw input
1,254
90
Normalized
1,254
90
Prepared
1,254
90
Aligned
90
90
Invalid removed
R²(i)
9.2%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points
90
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
+30%
No shift — both series at their actual dates.
89 overlapping points at this shift
Baseline
+30%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+30%
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
+36%
24 periods · Return correlation when both series rose
Both Falling
-8%
26 periods · Return correlation when both series fell
Diverging
-60%
39 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,164
A: 1164 / B: 0
Series A
Progressive Corporation (PGR)
PGR
Stock · 1,254 raw → 1,254 prepared
Series B
Marsh (MRSH)
MRSH
Stock · 90 raw → 90 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
15
Estimated crossover points between normalized spreads.
Slope
0.3975
Linear regression slope.
Intercept
-0.0011
Linear regression intercept.
Saved 2 weeks ago · ID: stock-mrsh_stock-pgr_daily_5y