SeriesMagCorrOverlapThrough
These move opposite each other about 59% of the time
Moderate inverse
A real but noisy link — useful as context, risky as a standalone signal.
UnitedHealth Group is one of the largest private health insurers and provides medical benefits to about 51 million members globally, including 1 million outside the US as of December 2025. As a leader in employer-sponsored, self-directed, and government-backed insurance plans, UnitedHealth has obtained massive scale in medical insurance. Along with its insurance assets, UnitedHealth's Optum franchises help create a healthcare services colossus that spans everything from pharmaceutical benefits to providing outpatient care and analytics to affiliates and third parties.
Market cap 333.1B · 390,000 employees
iShares Core S&P 500 ETF
IVV
What to Watch
Holds across regimes
Correlation is similar when markets rise (+35%) and fall (+19%) — 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
-54%
No shift — both series at their actual dates.
1,255 overlapping points at this shift
Time series with iShares Core 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
-54%
Pearson correlation
95% CI
-58% → -50%
Likely range
R²
29.6%
Variance explained
Trend agreement
59.3%
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.
UNH
UNITEDHEALTH GROUP INCORPORATED (Delaware)
Strongest inverse
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
+35%
112 periods · Return correlation when both series rose
Both Falling
+19%
84 periods · Return correlation when both series fell
Diverging
-31%
53 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
UNITEDHEALTH GROUP INCORPORATED (Delaware)
UNH
Market cap 333.1B · 390,000 employees
Stock · 1,255 raw → 1,255 prepared
Series B
iShares Core S&P 500 ETF
IVV
Stock · 1,255 raw → 1,255 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
19
Estimated crossover points between normalized spreads.
Slope
-0.6212
Linear regression slope.
Intercept
793.5411
Linear regression intercept.
Saved 57 minutes ago · ID: stock-ivv_stock-unh_5y
IVV
iShares Core S&P 500 ETF
Strongest positive