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DexCom, Inc. (DXCM) vs Real-time Sahm Rule Recession Indicator
Correlation
of % moves
-37%
In sync
of periods
29%
History
monthsmonths · through 2026-07
59
These move in the same direction about 29% of the time
Their swing sizes only faintly mirror each other (~14% of the pattern is shared).
Strong enough to use as a signal — check the stability and regime notes below before relying on it.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Slipping tighter
The recent pattern is tighter than its long-run baseline — keep an eye on whether this sticks.
Tighter in drawdowns
The relationship is stronger when both prices are falling than when both are rising — typical risk-off behaviour.
Flips between sync and inverse
Sometimes the two move together, sometimes opposite. Don't treat this as a stable signal.
Advanced
Statistics
In sync(i)
29%
Headline metric
Movement correlation(i)
-37%
Based on % moves
95% CI
-58% → -12%
Likely range of correlation
Pipeline
Pipeline Summary
59 paired data points survived the monthly window.
Raw input
1,253
799
Normalized
1,253
799
Prepared
61
799
Aligned
59
59
Invalid removed
R²(i)
14%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points(i)
57
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: -18 to 18 months.
Selected shift
No shift
Correlation at this shift
-37%
No shift — both series at their actual dates.
57 overlapping points at this shift
Baseline
-37%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-37%
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.
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
-53%
9 periods · Return correlation when both series rose
Both Falling
+94%
5 periods · Return correlation when both series fell
Diverging
-62%
43 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
742
A: 2 / B: 740
Series A
DexCom, Inc. (DXCM)
DXCM
Stock · 1,253 raw → 61 prepared
Series B
Real-time Sahm Rule Recession Indicator
SAHMREALTIME
FRED · 799 raw → 799 prepared
Sign agreement
75.9%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
-0.2039
Linear regression slope.
Intercept
-0.0018
Linear regression intercept.
Saved 4 months ago · ID: fred-sahmrealtime_stock-dxcm_monthly_5y