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Correlation
of % moves
+33%
In sync
of periods
62%
History
daysdays · through 2026-08-18
604
These move in the same direction about 62% of the time
Their swing sizes only faintly line up (~11% 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
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.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
62%
Headline metric
Movement correlation(i)
+33%
Based on % moves
95% CI
+25% → +40%
Likely range of correlation
Pipeline
Pipeline Summary
604 paired data points survived the daily window.
Raw input
1,253
604
Normalized
1,253
604
Prepared
1,253
604
Aligned
604
604
Invalid removed
R²(i)
11%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
603
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
+33%
No shift — both series at their actual dates.
603 overlapping points at this shift
Baseline
+33%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+33%
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
+24%
91 periods · Return correlation when both series rose
Both Falling
+43%
83 periods · Return correlation when both series fell
Diverging
-55%
74 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
649
A: 649 / B: 0
Series A
Roblox Corporation (RBLX)
RBLX
Stock · 1,253 raw → 1,253 prepared
Series B
Reddit, Inc. (RDDT)
RDDT
Stock · 604 raw → 604 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
19
Estimated crossover points between normalized spreads.
Slope
0.4447
Linear regression slope.
Intercept
0.0019
Linear regression intercept.
Saved 4 months ago · ID: stock-rblx_stock-rddt_daily_5y