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American Electric Power Co. Inc. (AEP) vs ICE BofA US High Yield Index Effective Yield
Correlation
of % moves
-18%
In sync
of periods
44%
History
daysdays · through 2026-05-08
750
These move opposite each other about 44% of the time
Their swing sizes only faintly mirror each other (~3% of the pattern is shared).
A faint pattern — interesting as colour, not strong enough to act on alone.
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
44.3%
Headline metric
Movement correlation(i)
-18%
Based on % moves
95% CI
-25% → -11%
Likely range of correlation
Pipeline
Pipeline Summary
750 paired data points survived the daily window.
Raw input
1,255
784
Normalized
1,255
784
Prepared
1,255
784
Aligned
750
750
Invalid removed
R²(i)
3.3%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
750
Deep
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
-18%
No shift — both series at their actual dates.
749 overlapping points at this shift
Baseline
-18%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-18%
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
+4%
54 periods · Return correlation when both series rose
Both Falling
+11%
57 periods · Return correlation when both series fell
Diverging
-71%
138 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
539
A: 505 / B: 34
Series A
AEP
Stock · 1,255 raw → 1,255 prepared
Series B
ICE BofA US High Yield Index Effective Yield
BAMLH0A0HYM2EY
FRED · 784 raw → 784 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
23
Estimated crossover points between normalized spreads.
Slope
-0.1536
Linear regression slope.
Intercept
-0.0002
Linear regression intercept.
Saved 2 days ago · ID: fred-bamlh0a0hym2ey_stock-aep_daily_5y