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Correlation
of % moves
+36%
In sync
of periods
70%
History
daysdays · through 2026-07-09
644
These move in the same direction about 70% of the time
Their swing sizes only faintly line up (~13% of the pattern is shared).
Strong enough to use as a signal — check the stability and regime notes below before relying on it.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Unusual right now
Recently tighter than usual — the pair is behaving differently than its long-run pattern.
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)
70%
Headline metric
Movement correlation(i)
+36%
Based on % moves
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
644 paired data points survived the daily window.
Raw input
1,254
644
Normalized
1,254
644
Prepared
1,254
644
Aligned
644
644
Invalid removed
13%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
642
Robust
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
+36%
No shift — both series at their actual dates.
642 overlapping points at this shift
Baseline
+36%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+36%
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
-3%
92 periods · Return correlation when both series rose
Both Falling
+31%
97 periods · Return correlation when both series fell
Diverging
-39%
55 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
610
A: 610 / B: 0
Series A
eBay Inc (EBAY)
EBAY
Stock · 1,254 raw → 1,254 prepared
Series B
Fiserv, Inc. Common Stock (FISV)
FISV
Stock · 644 raw → 644 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
0.3375
Linear regression slope.
Intercept
-0.0002
Linear regression intercept.
Saved 3 months ago · ID: stock-ebay_stock-fisv_daily_5y