Correlation Analysis
Apple Inc. vs TransDigm Group Incorporated
AAPL vs TDG
+0.839
Strong positive
When one moves up, the other tends to follow.
Apple Inc.
↗AAPL
Apple is among the largest companies in the world, with a broad portfolio of hardware and software products targeted at consumers and businesses. Apple's iPhone makes up a majority of the firm sales, and Apple's other products like Mac, iPad, and Watch are designed around the iPhone as the focal point of an expansive software ecosystem. Apple has progressively worked to add new applications, like streaming video, subscription bundles, and augmented reality. The firm designs its own software and semiconductors while working with subcontractors like Foxconn and TSMC to build its products and chips. Slightly less than half of Apple's sales come directly through its flagship stores, with a majority of sales coming indirectly through partnerships and distribution.
Market cap 3.8T
TransDigm Group Incorporated
↗TDG
TransDigm manufactures and services a broad set of specialized parts for commercial and military aircraft. The firm organizes itself in three segments: power and control, airframes, and a small non-aviation segment, which serves mostly off-road vehicles and mining equipment. It operates as an acquisitive holding company that focuses on buying up smaller firms that make proprietary aerospace products with substantial aftermarket demand. TransDigm regularly employs financial leverage to amplify its operating results.
Market cap 67.2B · 16,500 employees
Time Series
Rebased to 100
Who Moves First
TDG leads AAPL by 6 days
TDG tends to move before AAPL.
Best correlation after shifting: +0.843 (13 shifts scanned)
Do They Crash Together?
Correlation by Market Regime
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
-0.023
11 periods · Return correlation when both series rose
Both Falling
+0.257
6 periods · Return correlation when both series fell
Diverging
-0.605
18 periods · Return correlation when series moved apart
R-Squared
70.4%
Share of variance in one series explained by the other.
Trend Agreement
62.8%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,254
Deep shared window — 1,254 usable pairs.
Significance
p < 0.001
95% CI: [0.822, 0.855]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired observations survived the daily window.
Raw input
1,254
1,254
Normalized
1,254
1,254
Prepared
1,254
1,254
Aligned
1,254
1,254
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
0
A: 0 / B: 0
Series A
Apple Inc.
AAPL
Market cap 3.8T
Stock · 1,254 raw → 1,254 prepared
Series B
TransDigm Group Incorporated
TDG
Market cap 67.2B · 16,500 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
5
Estimated crossover points between normalized spreads.
Slope
6.7809
Linear regression slope.
Intercept
-305.2953
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-aapl-vs-stock-tdg-daily-20260408-vabwf1