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BERKSHIRE HATHAWAY Class B (BRK.B) vs USD/NOK Exchange Rate
Correlation
of % moves
-23%
In sync
of periods
44%
History
daysdays · through 2026-05-15
1,235
These move in the same direction about 44% of the time
Their swing sizes only faintly mirror each other (~5% 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.
Advanced
Statistics
In sync(i)
43.8%
Headline metric
Movement correlation(i)
-23%
Based on % moves
95% CI
-28% → -17%
Likely range of correlation
Pipeline
Pipeline Summary
1,235 paired data points survived the daily window.
Raw input
1,254
13,884
Normalized
1,254
13,884
Prepared
1,254
13,884
Aligned
1,235
1,235
Invalid removed
R²(i)
5.1%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
1,235
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
-23%
No shift — both series at their actual dates.
1,234 overlapping points at this shift
Baseline
-23%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-23%
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
+14%
30 periods · Return correlation when both series rose
Both Falling
+12%
28 periods · Return correlation when both series fell
Diverging
-74%
87 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
12,668
A: 19 / B: 12649
Series A
BERKSHIRE HATHAWAY Class B (BRK.B)
BRK.B
Stock · 1,254 raw → 1,254 prepared
Series B
USD/NOK Exchange Rate
DEXNOUS
FRED · 13,884 raw → 13,884 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
-0.1583
Linear regression slope.
Intercept
0.0002
Linear regression intercept.
Saved 3 weeks ago · ID: fred-dexnous_stock-brk.b_daily_5y