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Correlation
of % moves
+39%
In sync
of periods
71%
History
daysdays · through 2026-04-16
520
These move in the same direction about 71% of the time
Their swing sizes only faintly line up (~15% of the pattern is shared).
Strong enough to use as a signal — check the stability and regime notes below before relying on it.
On a log scale so equal % moves take equal vertical space — best when one series has grown much faster than the other.
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)
70.9%
Headline metric
Movement correlation(i)
+39%
Based on % moves
95% CI
+31% → +46%
Likely range of correlation
Pipeline
Pipeline Summary
520 paired data points survived the daily window.
Raw input
559
1,216
Normalized
559
1,216
Prepared
559
1,216
Aligned
520
520
Invalid removed
R²(i)
15.2%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
520
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
+39%
No shift — both series at their actual dates.
519 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
+22%
116 periods · Return correlation when both series rose
Both Falling
+21%
93 periods · Return correlation when both series fell
Diverging
-43%
40 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
735
A: 39 / B: 696
Series A
Astera Labs, Inc. Common Stock (ALAB)
ALAB
Stock · 559 raw → 559 prepared
Series B
PSTG
Stock · 1,216 raw → 1,216 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
0.2536
Linear regression slope.
Intercept
0.0000
Linear regression intercept.
Saved last month · ID: stock-alab_stock-pstg_daily_5y