SeriesMagCorrSyncOverlapThrough
Correlation
-73%
of % moves
In sync
60%
of periods
History
1,085
days · through 2026-05-04
These move opposite each other about 60% of the time
When one swings, the other often swings by a similar amount in the opposite direction (~54% of the pattern is shared).
A faint pattern — interesting as colour, not strong enough to act on alone.
Time Series
Both lines start at the same point — easy to compare when growth rates are similar.
What to Watch
Unusual right now
Recently tighter 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.
Mostly stable
The relationship drifts a little but stays in the same neighbourhood.
Advanced
Statistics
In sync(i)
60.2%
Headline metric
Movement correlation(i)
-73%
Based on % moves
95% CI
-76% → -71%
Likely range of correlation
Pipeline
Pipeline Summary
1,085 paired data points survived the daily window.
Raw input
1,255
1,085
Normalized
1,255
1,085
Prepared
1,255
1,085
Aligned
1,085
1,085
Invalid removed
Explore
Top 5 by absolute correlation
Ranked across both sides of this comparison using the same dense row format as the single-symbol correlations view.
R²(i)
54.0%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
1,085
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
-73%
No shift — both series at their actual dates.
1,085 overlapping points at this shift
Baseline
-73%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-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
+35%
84 periods · Return correlation when both series rose
Both Falling
+23%
78 periods · Return correlation when both series fell
Diverging
-47%
87 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
170
A: 170 / B: 0
Series A
BRK.B
Stock · 1,255 raw → 1,255 prepared
Series B
POAHY
Stock · 1,085 raw → 1,085 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
7
Estimated crossover points between normalized spreads.
Slope
-0.0142
Linear regression slope.
Intercept
10.9430
Linear regression intercept.
Saved 2 days ago · ID: stock-brk.b_stock-poahy_5y