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Sandisk Corporation Common Stock (SNDK) vs USD/BRL Exchange Rate
Correlation
of % moves
-21%
In sync
of periods
44%
History
daysdays · through 2026-05-15
307
These move opposite each other about 44% of the time
Their swing sizes only faintly mirror each other (~4% 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
Slipping looser
The recent pattern is looser than its long-run baseline — keep an eye on whether this sticks.
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)
43.8%
Headline metric
Movement correlation(i)
-21%
Based on % moves
95% CI
-31% → -10%
Likely range of correlation
Pipeline
Pipeline Summary
307 paired data points survived the daily window.
Raw input
314
7,868
Normalized
314
7,868
Prepared
314
7,868
Aligned
307
307
Invalid removed
R²(i)
4.4%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points
307
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
-21%
No shift — both series at their actual dates.
306 overlapping points at this shift
Baseline
-21%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-21%
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
-11%
52 periods · Return correlation when both series rose
Both Falling
-21%
47 periods · Return correlation when both series fell
Diverging
-45%
150 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
7,568
A: 7 / B: 7561
Series A
Sandisk Corporation Common Stock (SNDK)
SNDK
Stock · 314 raw → 314 prepared
Series B
USD/BRL Exchange Rate
DEXBZUS
FRED · 7,868 raw → 7,868 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
-0.0239
Linear regression slope.
Intercept
-0.0001
Linear regression intercept.
Saved 2 weeks ago · ID: fred-dexbzus_stock-sndk_daily_5y