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Correlation
of % moves
+23%
In sync
of periods
58%
History
daysdays · through 2026-09-14
185
These move in the same direction about 58% 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
Slipping tighter
The recent pattern is tighter than its long-run baseline — keep an eye on whether this sticks.
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
58%
Headline metric
Movement correlation(i)
+23%
Based on % moves
95% CI
+9% → +36%
Likely range of correlation
Pipeline
Pipeline Summary
185 paired data points survived the daily window.
Raw input
185
1,253
Normalized
185
1,253
Prepared
185
1,253
Aligned
185
185
Invalid removed
R²(i)
5%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points(i)
184
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
+23%
No shift — both series at their actual dates.
184 overlapping points at this shift
Baseline
+23%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+23%
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
+15%
60 periods · Return correlation when both series rose
Both Falling
+10%
47 periods · Return correlation when both series fell
Diverging
-43%
77 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,068
A: 0 / B: 1068
Series A
Medline Inc. Class A common stock (MDLN)
MDLN
Stock · 185 raw → 185 prepared
Series B
Roper Technologies, Inc. Common Stock (ROP)
ROP
Stock · 1,253 raw → 1,253 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
2
Estimated crossover points between normalized spreads.
Slope
0.1600
Linear regression slope.
Intercept
-0.0005
Linear regression intercept.
Saved 4 months ago · ID: stock-mdln_stock-rop_daily_5y