SeriesMagCorrOverlapThrough
These move together about 57% of the time
Strong positive
Strong enough to use as a signal — read the stability and regime notes below before relying on it.
The wireless business contributes nearly 70% of AT&T's revenue. The company is the third-largest US wireless carrier, connecting 74 million postpaid and 17 million prepaid phone customers. Fixed-line enterprise services, which account for about 14% of revenue, include internet access, private networking, security, voice, and wholesale network capacity. Residential services, about 11% of revenue, primarily consist of in-home broadband internet access, serving 15 million customers. AT&T also has a sizable presence in Mexico, with 25 million wireless customers, but this business only accounts for 3% of revenue. The company recently sold its 70% equity stake in satellite television provider Dire
Market cap 181.1B · 133,030 employees
Vanguard FTSE Emerging Markets ETF
VWO
What to Watch
Unusual right now
Recent correlation (-19%) is 3.3σ from the long-run average of +84% — pair is behaving differently than usual.
Holds across regimes
Correlation is similar when markets rise (+15%) and fall (+13%) — reliable in both directions.
Regime-dependent
The correlation has flipped sign across time windows — not reliable as a standalone signal.
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
+84%
No shift — both series at their actual dates.
1,255 overlapping points at this shift
Time series with Vanguard FTSE Emerging Markets 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
+84%
Pearson correlation
95% CI
+82% → +85%
Likely range
R²
69.9%
Variance explained
Trend agreement
56.9%
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
+15%
89 periods · Return correlation when both series rose
Both Falling
+13%
81 periods · Return correlation when both series fell
Diverging
-50%
79 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
AT&T Inc.
T
Market cap 181.1B · 133,030 employees
Stock · 1,255 raw → 1,255 prepared
Series B
Vanguard FTSE Emerging Markets ETF
VWO
Stock · 1,255 raw → 1,255 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
63
Estimated crossover points between normalized spreads.
Slope
1.0021
Linear regression slope.
Intercept
23.8527
Linear regression intercept.
Saved 2 hours ago · ID: stock-t_stock-vwo_5y
VWO
Vanguard FTSE Emerging Markets ETF
Strongest positive