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Correlation
of % moves
-2%
In sync
of periods
55%
History
daysdays · through 2026-05-28
589
These move in the same direction about 55% of the time
Their swing sizes barely line up — almost no shared pattern.
Roughly random — these don't track each other in a meaningful way.
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 tighter
The recent pattern is tighter than its long-run baseline — keep an eye on whether this sticks.
VELO moves ~4 days before ISRG
Watch VELO for an early read on ISRG.
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)
54.8%
Headline metric
Movement correlation(i)
-2%
Based on % moves
95% CI
-10% → +6%
Likely range of correlation
Pipeline
Pipeline Summary
589 paired data points survived the daily window.
Raw input
1,254
589
Normalized
1,254
589
Prepared
1,254
589
Aligned
589
589
Invalid removed
R²(i)
0.0%
Variance explained
Significance
n.s.
Statistical confidence
Data points
589
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
-4 days
Correlation at this shift
-7%
+5% stronger than no-shift baseline
Velo3D, Inc. Common stock (VELO) shifted 4 days later. Reads: "Does Intuitive Surgical Inc. (ISRG) today line up with Velo3D, Inc. Common stock (VELO) 4 days ago?"
579 overlapping points at this shift
Baseline
-2%
No-shift correlation, matching the main time-series chart above.
Peak shift
-4 days
-7%
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
+20%
69 periods · Return correlation when both series rose
Both Falling
+7%
59 periods · Return correlation when both series fell
Diverging
-43%
119 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
665
A: 665 / B: 0
Series A
Intuitive Surgical Inc. (ISRG)
ISRG
Stock · 1,254 raw → 1,254 prepared
Series B
Velo3D, Inc. Common stock (VELO)
VELO
Stock · 589 raw → 589 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
9
Estimated crossover points between normalized spreads.
Slope
-0.0536
Linear regression slope.
Intercept
0.0035
Linear regression intercept.
Saved 3 weeks ago · ID: stock-isrg_stock-velo_daily_5y