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Correlation
of % moves
+39%
In sync
of periods
65%
History
daysdays · through 2026-08-07
1,008
These move in the same direction about 65% of the time
Their swing sizes only faintly line up (~16% 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
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Advanced
Statistics
In sync(i)
65%
Headline metric
Movement correlation(i)
+39%
Based on % moves
95% CI
+34% → +44%
Likely range of correlation
Pipeline
Pipeline Summary
1,008 paired data points survived the daily window.
Raw input
1,008
1,253
Normalized
1,008
1,253
Prepared
1,008
1,253
Aligned
1,008
1,008
Invalid removed
R²(i)
16%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
1,006
Deep
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
+39%
No shift — both series at their actual dates.
1,006 overlapping points at this shift
Baseline
+39%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+39%
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
+34%
78 periods · Return correlation when both series rose
Both Falling
+32%
70 periods · Return correlation when both series fell
Diverging
-55%
40 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
245
A: 0 / B: 245
Series A
RBC Bearings Incorporated (RBC)
RBC
Stock · 1,008 raw → 1,008 prepared
Series B
PROTO LABS, INC. (PRLB)
PRLB
Stock · 1,253 raw → 1,253 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
0.7010
Linear regression slope.
Intercept
-0.0000
Linear regression intercept.
Saved 3 months ago · ID: stock-prlb_stock-rbc_daily_5y