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Correlation
of % moves
+13%
In sync
of periods
54%
History
daysdays · through 2026-07-31
619
These move in the same direction about 54% of the time
Their swing sizes only faintly line up (~2% of the pattern is shared).
Roughly random — these don't track each other in a meaningful way.
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)
54%
Headline metric
Movement correlation(i)
+13%
Based on % moves
95% CI
+5% → +20%
Likely range of correlation
Pipeline
Pipeline Summary
619 paired data points survived the daily window.
Raw input
619
1,253
Normalized
619
1,253
Prepared
619
1,253
Aligned
619
619
Invalid removed
R²(i)
2%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points(i)
618
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
+13%
No shift — both series at their actual dates.
618 overlapping points at this shift
Baseline
+13%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+13%
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
-6%
69 periods · Return correlation when both series rose
Both Falling
-8%
82 periods · Return correlation when both series fell
Diverging
-4%
95 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
634
A: 0 / B: 634
Series A
AtlasClear Holdings, Inc. (ATCH)
ATCH
Stock · 619 raw → 619 prepared
Series B
State Street SPDR S&P 500 ETF Trust (SPY)
SPY
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
0.0106
Linear regression slope.
Intercept
0.0008
Linear regression intercept.
Saved 2 months ago · ID: stock-atch_stock-spy_daily_5y