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Natera, Inc. Common Stock (NTRA) vs PPI: All Commodities
Correlation
of % moves
-40%
In sync
of periods
45%
History
monthsmonths · through 2026-07
59
These move in the same direction about 45% of the time
Their swing sizes loosely mirror each other (~16% 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.
Decouples in drawdowns
The relationship weakens when both prices are falling — don't count on this pair as a hedge under stress.
Flips between sync and inverse
Sometimes the two move together, sometimes opposite. Don't treat this as a stable signal.
Advanced
Statistics
In sync(i)
45%
Headline metric
Movement correlation(i)
-40%
Based on % moves
95% CI
-60% → -16%
Likely range of correlation
Pipeline
Pipeline Summary
59 paired data points survived the monthly window.
Raw input
1,253
1,363
Normalized
1,253
1,363
Prepared
61
1,363
Aligned
59
59
Invalid removed
R²(i)
16%
Variance explained
Significance
p < 0.01
Statistical confidence
Data points(i)
58
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: -18 to 18 months.
Selected shift
No shift
Correlation at this shift
-40%
No shift — both series at their actual dates.
58 overlapping points at this shift
Baseline
-40%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-40%
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
-43%
17 periods · Return correlation when both series rose
Both Falling
-5%
9 periods · Return correlation when both series fell
Diverging
-68%
32 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
1,306
A: 2 / B: 1304
Series A
Natera, Inc. Common Stock (NTRA)
NTRA
Stock · 1,253 raw → 61 prepared
Series B
PPI: All Commodities
PPIACO
FRED · 1,363 raw → 1,363 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
4
Estimated crossover points between normalized spreads.
Slope
-0.0437
Linear regression slope.
Intercept
0.0038
Linear regression intercept.
Saved 4 months ago · ID: fred-ppiaco_stock-ntra_monthly_5y