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Correlation
of values
+55%
In sync
of periods
—
History
monthsmonths · through 2024-01
49
These move together
Their swing sizes loosely line up (~30% of the pattern is shared).
Roughly random — these don't track each other in a meaningful way.
Both lines start at the same point — easy to compare when growth rates are similar.
Advanced
Statistics
In sync(i)
N/A
Headline metric
Movement correlation(i)
+55%
Based on values
95% CI
+31% → +72%
Pipeline
Pipeline Summary
49 paired data points survived the monthly window.
Raw input
51
605
Normalized
51
605
Prepared
51
605
Aligned
49
49
Invalid removed
Likely range of correlation
R²(i)
29.7%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
49
Thin
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: 0 to 0 months.
Selected shift
No shift
Correlation at this shift
+55%
No shift — both series at their actual dates.
49 overlapping points at this shift
Baseline
+55%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+55%
A non-zero peak suggests one series lines up better when shifted against the other.
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
558
A: 2 / B: 556
Series A
Real Median Personal Income in the United States
MEPAINUSA672N
FRED · 51 raw → 51 prepared
Series B
Total Vehicle Sales
TOTALSA
FRED · 605 raw → 605 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
0.0002
Linear regression slope.
Intercept
7.2729
Linear regression intercept.
Saved last month · ID: fred-mepainusa672n_fred-totalsa_monthly_5y