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Correlation
of % moves
+25%
In sync
of periods
61%
History
daysdays · through 2026-05-28
111
These move in the same direction about 61% of the time
Their swing sizes only faintly line up (~6% 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.
Tighter in drawdowns
The relationship is stronger when both prices are falling than when both are rising — typical risk-off behaviour.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
60.9%
Headline metric
Movement correlation(i)
+25%
Based on % moves
95% CI
+6% → +42%
Likely range of correlation
Pipeline
Pipeline Summary
111 paired data points survived the daily window.
Raw input
111
1,254
Normalized
111
1,254
Prepared
111
1,254
Aligned
111
111
Invalid removed
R²(i)
6.1%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points
111
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
+25%
No shift — both series at their actual dates.
110 overlapping points at this shift
Baseline
+25%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+25%
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
+7%
33 periods · Return correlation when both series rose
Both Falling
+43%
34 periods · Return correlation when both series fell
Diverging
-62%
43 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,143
A: 0 / B: 1143
Series A
Medline Inc. Class A common stock (MDLN)
MDLN
Stock · 111 raw → 111 prepared
Series B
Natera, Inc. Common Stock (NTRA)
NTRA
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
4
Estimated crossover points between normalized spreads.
Slope
0.3027
Linear regression slope.
Intercept
-0.0002
Linear regression intercept.
Saved 3 weeks ago · ID: stock-mdln_stock-ntra_daily_5y