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Correlation
of % moves
+48%
In sync
of periods
65%
History
daysdays · through 2026-07-09
577
These move in the same direction about 65% of the time
Their swing sizes loosely line up (~23% of the pattern is shared).
A real but noisy link — useful as context, risky as a standalone signal.
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.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
65%
Headline metric
Movement correlation(i)
+48%
Based on % moves
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
577 paired data points survived the daily window.
Raw input
1,254
577
Normalized
1,254
577
Prepared
1,254
577
Aligned
577
577
Invalid removed
23%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
576
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
+48%
No shift — both series at their actual dates.
576 overlapping points at this shift
Baseline
+48%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+48%
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
+42%
107 periods · Return correlation when both series rose
Both Falling
+41%
78 periods · Return correlation when both series fell
Diverging
-51%
63 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
677
A: 677 / B: 0
Series A
Amphenol Corporation (APH)
APH
Stock · 1,254 raw → 1,254 prepared
Series B
Astera Labs, Inc. Common Stock (ALAB)
ALAB
Stock · 577 raw → 577 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
33
Estimated crossover points between normalized spreads.
Slope
1.1369
Linear regression slope.
Intercept
0.0012
Linear regression intercept.
Saved 3 months ago · ID: stock-alab_stock-aph_daily_5y