SeriesMagCorrOverlapThrough
These move together about 88% of the time
Very strong positive
Strong enough to use as a signal — read the stability and regime notes below before relying on it.
State Street SPDR S&P 500 ETF Trust
SPY
Invesco QQQ Trust, Series 1
QQQ
What to Watch
Holds across regimes
Correlation is similar when markets rise (+91%) and fall (+93%) — reliable in both directions.
Rock solid
Correlation barely moves across time windows — treat this as a reliable relationship.
Time Series
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
+99%
No shift — both series at their actual dates.
1,255 overlapping points at this shift
Time series with Invesco QQQ Trust, Series 1 at original dates
Indexed to 100 at start
Deep Dive
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Corr
+99%
Pearson correlation
95% CI
+99% → +100%
Likely range
R²
98.9%
Variance explained
Trend agreement
87.8%
Same-direction moves
Significance
p < 0.001
Statistical confidence
Data points
1,255
Deep
Pipeline
Pipeline Summary
1,255 paired data points survived the daily window.
Raw input
1,255
1,255
Normalized
1,255
1,255
Prepared
1,255
1,255
Aligned
1,255
1,255
Invalid removed
Explore
The strongest positive and inverse pairs we’ve saved for each side of this comparison — good jumping-off points if this result raised a question.
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
+91%
121 periods · Return correlation when both series rose
Both Falling
+93%
108 periods · Return correlation when both series fell
Diverging
-60%
20 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
State Street SPDR S&P 500 ETF Trust
SPY
Stock · 1,255 raw → 1,255 prepared
Series B
Invesco QQQ Trust, Series 1
QQQ
Stock · 1,255 raw → 1,255 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
31
Estimated crossover points between normalized spreads.
Slope
1.0843
Linear regression slope.
Intercept
-122.6325
Linear regression intercept.
Saved 1 hour ago · ID: stock-qqq_stock-spy_5y
QQQ
Invesco QQQ Trust, Series 1
Strongest positive