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Correlation
of values
+81%
In sync
of periods
56%
History
monthsmonths · through 2026-05
664
These move in the same direction about 56% of the time
When one swings, the other almost always swings by a closely matched amount (~66% of the pattern is shared).
A faint pattern — interesting as colour, not strong enough to act on alone.
On a log scale so equal % moves take equal vertical space — best when one series has grown much faster than the other.
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)
56%
Headline metric
Movement correlation(i)
+81%
Based on values
95% CI
N/A
Likely range
Pipeline
Pipeline Summary
664 paired data points survived the monthly window.
Raw input
13,971
1,361
Normalized
13,971
1,361
Prepared
666
1,361
Aligned
664
664
Invalid removed
66%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
664
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: -18 to 18 months.
Selected shift
No shift
Correlation at this shift
+81%
No shift — both series at their actual dates.
664 overlapping points at this shift
Baseline
+81%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+81%
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
+72%
11 periods · Return correlation when both series rose
Both Falling
+55%
5 periods · Return correlation when both series fell
Diverging
-85%
16 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
699
A: 2 / B: 697
Series A
NASDAQ Composite
NASDAQCOM
FRED · 13,971 raw → 666 prepared
Series B
PPI: All Commodities
PPIACO
FRED · 1,361 raw → 1,361 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
0.0098
Linear regression slope.
Intercept
109.1231
Linear regression intercept.
Saved 3 months ago · ID: fred-nasdaqcom_fred-ppiaco_monthly_5y