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Correlation
of % moves
-41%
In sync
of periods
60%
History
daysdays · through 2026-05-22
646
These move in the same direction about 60% of the time
Their swing sizes loosely mirror each other (~17% 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
Unusual right now
Recently tighter than usual — the pair is behaving differently than its long-run pattern.
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)
59.8%
Headline metric
Movement correlation(i)
-41%
Based on % moves
95% CI
-47% → -34%
Likely range of correlation
Pipeline
Pipeline Summary
646 paired data points survived the daily window.
Raw input
1,256
646
Normalized
1,256
646
Prepared
1,256
646
Aligned
646
646
Invalid removed
R²(i)
16.7%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
646
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
-41%
No shift — both series at their actual dates.
645 overlapping points at this shift
Baseline
-41%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-41%
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
+35%
89 periods · Return correlation when both series rose
Both Falling
+14%
77 periods · Return correlation when both series fell
Diverging
-53%
78 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
The Southern Company (SO)
SO
Stock · 1,256 raw → 1,256 prepared
Series B
Fiserv, Inc. Common Stock (FISV)
FISV
Stock · 646 raw → 646 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
25
Estimated crossover points between normalized spreads.
Slope
-0.7448
Linear regression slope.
Intercept
-0.0007
Linear regression intercept.
Saved 2 weeks ago · ID: stock-fisv_stock-so_daily_5y