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Sandisk Corporation Common Stock (SNDK) vs USA Rare Earth, Inc. Class A Common Stock (USAR)
Correlation
of % moves
+25%
In sync
of periods
57%
History
daysdays · through 2026-09-15
378
These move in the same direction about 57% of the time
Their swing sizes only faintly line up (~6% 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
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)
57%
Headline metric
Movement correlation(i)
+25%
Based on % moves
95% CI
+15% → +34%
Likely range of correlation
Pipeline
Pipeline Summary
378 paired data points survived the daily window.
Raw input
392
378
Normalized
392
378
Prepared
392
378
Aligned
378
378
Invalid removed
R²(i)
6%
Variance explained
Significance
p < 0.001
Statistical confidence
Data points(i)
377
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
+25%
No shift — both series at their actual dates.
377 overlapping points at this shift
Baseline
+25%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
+25%
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
-1%
85 periods · Return correlation when both series rose
Both Falling
+5%
74 periods · Return correlation when both series fell
Diverging
-35%
90 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
14
A: 14 / B: 0
Series A
Sandisk Corporation Common Stock (SNDK)
SNDK
Stock · 392 raw → 392 prepared
Series B
USA Rare Earth, Inc. Class A Common Stock (USAR)
USAR
Stock · 378 raw → 378 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
13
Estimated crossover points between normalized spreads.
Slope
0.3165
Linear regression slope.
Intercept
-0.0033
Linear regression intercept.
Saved 4 months ago · ID: stock-sndk_stock-usar_daily_5y