SeriesMagCorrOverlapThrough
These move together about 76% of the time
Very strong positive
Strong enough to use as a signal — read the stability and regime notes below before relying on it.
Apple is among the largest companies in the world, with a broad portfolio of hardware and software products targeted at consumers and businesses. Apple's iPhone makes up a majority of the firm sales, and Apple's other products like Mac, iPad, and Watch are designed around the iPhone as the focal point of an expansive software ecosystem. Apple has progressively worked to add new applications, like streaming video, subscription bundles, and augmented reality. The firm designs its own software and semiconductors while working with subcontractors like Foxconn and TSMC to build its products and chips. Slightly less than half of Apple's sales come directly through its flagship stores, with a major
Market cap 3.9T · 166,000 employees
Vanguard S&P 500 ETF
VOO
What to Watch
Holds across regimes
Correlation is similar when markets rise (+56%) and fall (+61%) — reliable in both directions.
Mostly stable
Correlation drifts a little but stays in the same neighbourhood.
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
+93%
No shift — both series at their actual dates.
1,255 overlapping points at this shift
Time series with Vanguard S&P 500 ETF 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
+93%
Pearson correlation
95% CI
+93% → +94%
Likely range
R²
87.0%
Variance explained
Trend agreement
75.5%
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
+56%
117 periods · Return correlation when both series rose
Both Falling
+61%
97 periods · Return correlation when both series fell
Diverging
-57%
35 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
Apple Inc.
AAPL
Market cap 3.9T · 166,000 employees
Stock · 1,255 raw → 1,255 prepared
Series B
Vanguard S&P 500 ETF
VOO
Stock · 1,255 raw → 1,255 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
2.0359
Linear regression slope.
Intercept
76.0068
Linear regression intercept.
Saved 3 hours ago · ID: stock-aapl_stock-voo_5y
VOO
Vanguard S&P 500 ETF
Strongest positive