SeriesMagCorrOverlapThrough
These move together about 68% of the time
Moderate positive
A real but noisy link — useful as context, risky as a standalone signal.
Omaha, Nebraska-based Union Pacific is the largest public railroad in North America. Operating on more than 30,000 miles of track in the western two-thirds of the US, Union Pacific generated $24.5 billion of revenue in 2025 by hauling coal, industrial products, intermodal containers, agricultural goods, chemicals, fertilizers, and automotive goods. Union Pacific owns about one-fourth of Mexican railroad Ferromex and historically derives roughly 10% of its revenue hauling freight to and from Mexico.
Market cap 159B · 28,647 employees
Invesco S&P 500 Quality ETF
SPHQ
What to Watch
Tighter in drawdowns
Pair moves more tightly when both fall (+63%) than when both rise (+30%) — typical risk-off behaviour.
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
+49%
No shift — both series at their actual dates.
1,255 overlapping points at this shift
Time series with Invesco S&P 500 Quality 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
+49%
Pearson correlation
95% CI
+45% → +53%
Likely range
R²
24.4%
Variance explained
Trend agreement
68.2%
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
+30%
102 periods · Return correlation when both series rose
Both Falling
+63%
88 periods · Return correlation when both series fell
Diverging
-48%
59 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
Union Pacific Corp.
UNP
Market cap 159B · 28,647 employees
Stock · 1,255 raw → 1,255 prepared
Series B
Invesco S&P 500 Quality ETF
SPHQ
Stock · 1,255 raw → 1,255 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
58
Estimated crossover points between normalized spreads.
Slope
0.3179
Linear regression slope.
Intercept
-14.7905
Linear regression intercept.
Saved 56 minutes ago · ID: stock-sphq_stock-unp_5y
SPHQ
Invesco S&P 500 Quality ETF
Strongest positive