SeriesMagCorrSyncOverlapThrough
Correlation
of % moves
+89%
In sync
of periods
73%
History
daysdays · through 2026-05-01
1,252
These move in the same direction about 73% of the time
When one swings, the other almost always swings by a closely matched amount (~80% 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
Unusual right now
Recently looser than usual — the pair is behaving differently than its long-run pattern.
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.
Explore
Advanced
Statistics
In sync(i)
72.7%
Headline metric
Movement correlation(i)
+89%
Based on % moves
95% CI
+88% → +90%
Likely range of correlation
Pipeline
Pipeline Summary
1,252 paired data points survived the daily window.
Raw input
1,255
2,515
Normalized
1,255
2,515
Prepared
1,255
2,515
Aligned
1,252
1,252
Invalid removed
R²(i)
79.6%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
1,252
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
+89%
No shift — both series at their actual dates.
1,252 overlapping points at this shift
Baseline
+89%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+89%
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
+56%
112 periods · Return correlation when both series rose
Both Falling
+55%
85 periods · Return correlation when both series fell
Diverging
-64%
52 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,266
A: 3 / B: 1263
Series A
NDAQ
Stock · 1,255 raw → 1,255 prepared
Series B
S&P 500
SP500
FRED · 2,515 raw → 2,515 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
7
Estimated crossover points between normalized spreads.
Slope
63.7695
Linear regression slope.
Intercept
773.9531
Linear regression intercept.
Saved 2 days ago · ID: fred-sp500_stock-ndaq_5y
Explore
Top 10 by absolute correlation
Ranked across both sides of this comparison using the same dense row format as the single-symbol correlations view.