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ICE BofA US High Yield Index Effective Yield vs State Street SPDR S&P 500 ETF Trust (SPY)
Correlation
of % moves
-60%
In sync
of periods
28%
History
daysdays · through 2026-07-06
750
These move in the same direction about 28% of the time
Their swing sizes loosely mirror each other (~36% 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
Holds in both up and down markets
The relationship is similar whether prices are rising or falling — reliable in both directions.
Advanced
Statistics
In sync(i)
28%
Headline metric
Movement correlation(i)
-60%
Based on % moves
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
750 paired data points survived the daily window.
Raw input
785
1,254
Normalized
785
1,254
Prepared
785
1,254
Aligned
750
750
Invalid removed
36%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
749
Robust
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
-60%
No shift — both series at their actual dates.
749 overlapping points at this shift
Baseline
-60%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-60%
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
+20%
26 periods · Return correlation when both series rose
Both Falling
-10%
20 periods · Return correlation when both series fell
Diverging
-81%
189 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
539
A: 35 / B: 504
Series A
ICE BofA US High Yield Index Effective Yield
BAMLH0A0HYM2EY
FRED · 785 raw → 785 prepared
Series B
State Street SPDR S&P 500 ETF Trust (SPY)
SPY
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
11
Estimated crossover points between normalized spreads.
Slope
-0.5601
Linear regression slope.
Intercept
0.0006
Linear regression intercept.
Saved 2 months ago · ID: fred-bamlh0a0hym2ey_stock-spy_daily_5y