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Sandisk Corporation Common Stock (SNDK) vs St. Louis Financial Stress Index
Correlation
of % moves
-36%
In sync
of periods
52%
History
weeksweeks · through 2026-22
66
These move in the same direction about 52% of the time
Their swing sizes only faintly mirror each other (~13% of the pattern is shared).
Roughly random — these don't track each other in a meaningful way.
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.
Rock solid
The relationship barely changes from period to period — treat it as a reliable signal.
Advanced
Statistics
In sync(i)
52.3%
Headline metric
Movement correlation(i)
-36%
Based on % moves
95% CI
-55% → -12%
Likely range of correlation
Pipeline
Pipeline Summary
66 paired data points survived the weekly window.
Raw input
327
1,692
Normalized
327
1,692
Prepared
68
1,692
Aligned
66
66
Invalid removed
R²(i)
12.7%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points
66
Thin
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: -12 to 5 weeks.
Selected shift
No shift
Correlation at this shift
-36%
No shift — both series at their actual dates.
65 overlapping points at this shift
Baseline
-36%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-36%
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
-33%
26 periods · Return correlation when both series rose
Both Falling
-42%
8 periods · Return correlation when both series fell
Diverging
-30%
31 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,628
A: 2 / B: 1626
Series A
Sandisk Corporation Common Stock (SNDK)
SNDK
Stock · 327 raw → 68 prepared
Series B
St. Louis Financial Stress Index
STLFSI4
FRED · 1,692 raw → 1,692 prepared
Sign agreement
3.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
-0.6954
Linear regression slope.
Intercept
0.0647
Linear regression intercept.
Saved last month · ID: fred-stlfsi4_stock-sndk_weekly_5y