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Correlation
of % moves
+44%
In sync
of periods
68%
History
daysdays · through 2026-09-04
617
These move in the same direction about 68% of the time
Their swing sizes loosely line up (~19% 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.
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)
68%
Headline metric
Movement correlation(i)
+44%
Based on % moves
95% CI
+37% → +50%
Likely range of correlation
Pipeline
Pipeline Summary
617 paired data points survived the daily window.
Raw input
617
1,253
Normalized
617
1,253
Prepared
617
1,253
Aligned
617
617
Invalid removed
R²(i)
19%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
616
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
+44%
No shift — both series at their actual dates.
616 overlapping points at this shift
Baseline
+44%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+44%
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
+44%
94 periods · Return correlation when both series rose
Both Falling
+50%
80 periods · Return correlation when both series fell
Diverging
-64%
73 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
636
A: 0 / B: 636
Series A
Reddit, Inc. (RDDT)
RDDT
Stock · 617 raw → 617 prepared
Series B
SoFi Technologies, Inc. Common Stock (SOFI)
SOFI
Stock · 1,253 raw → 1,253 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
27
Estimated crossover points between normalized spreads.
Slope
0.3151
Linear regression slope.
Intercept
0.0009
Linear regression intercept.
Saved 4 months ago · ID: stock-rddt_stock-sofi_daily_5y