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Correlation
of values
+65%
In sync
of periods
50%
History
weeksweeks · through 2026-35
156
These move in the same direction about 50% of the time
When one swings, the other often swings by a similar amount (~42% 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.
What to Watch
15Y Mortgage Rate moves ~12 weeks before IG Bond Spread
Watch 15Y Mortgage Rate for an early read on IG Bond Spread.
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
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)
50%
Headline metric
Movement correlation(i)
+65%
Based on values
95% CI
+55% → +73%
Likely range of correlation
Pipeline
Pipeline Summary
156 paired data points survived the weekly window.
Raw input
784
1,827
Normalized
784
1,827
Prepared
157
1,827
Aligned
156
156
Invalid removed
R²(i)
42%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
156
Usable
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: -12 to 12 weeks.
Selected shift
-12 weeks
Correlation at this shift
+73%
+8% stronger than no-shift baseline
15Y Mortgage Rate shifted 12 weeks later. Reads: "Does IG Bond Spread today line up with 15Y Mortgage Rate 12 weeks ago?"
144 overlapping points at this shift
Baseline
+65%
No-shift correlation, matching the main time-series chart above.
Peak shift
-12 weeks
+73%
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
+15%
29 periods · Return correlation when both series rose
Both Falling
-4%
47 periods · Return correlation when both series fell
Diverging
-56%
79 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,672
A: 1 / B: 1671
Series A
IG Bond Spread
BAMLC0A0CM
FRED · 784 raw → 157 prepared
Series B
15Y Mortgage Rate
MORTGAGE15US
FRED · 1,827 raw → 1,827 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
10
Estimated crossover points between normalized spreads.
Slope
1.7583
Linear regression slope.
Intercept
4.3291
Linear regression intercept.
Saved 4 months ago · ID: fred-bamlc0a0cm_fred-mortgage15us_weekly_5y