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Correlation
of % moves
+23%
In sync
of periods
54%
History
daysdays · through 2026-07-09
139
These move in the same direction about 54% of the time
Their swing sizes only faintly line up (~5% of the pattern is shared).
Roughly random — these don't track each other in a meaningful way.
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)
54%
Headline metric
Movement correlation(i)
+23%
Based on % moves
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
139 paired data points survived the daily window.
Raw input
1,254
139
Normalized
1,254
139
Prepared
1,254
139
Aligned
139
139
Invalid removed
5%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
138
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.
138 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
+13%
34 periods · Return correlation when both series rose
Both Falling
-14%
40 periods · Return correlation when both series fell
Diverging
-50%
64 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,115
A: 1115 / B: 0
Series A
Intuitive Surgical Inc. (ISRG)
ISRG
Stock · 1,254 raw → 1,254 prepared
Series B
Medline Inc. Class A common stock (MDLN)
MDLN
Stock · 139 raw → 139 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
0.3344
Linear regression slope.
Intercept
0.0007
Linear regression intercept.
Saved 3 months ago · ID: stock-isrg_stock-mdln_daily_5y