Correlation Analysis
Alphabet Inc. Class C Capital Stock vs Paccar Inc
GOOG vs PCAR
+0.695
Strong positive
When one moves up, the other tends to follow.
Alphabet Inc. Class C Capital Stock
↗GOOG
Alphabet is a holding company that wholly owns internet giant Google. The California-based company derives slightly less than 90% of its revenue from Google services, the vast majority of which is advertising sales. Alongside online ads, Google services houses sales stemming from Google's subscription services (YouTube TV and YouTube Music, among others), platforms (sales and in-app purchases on Play Store), and devices (Chromebooks, Pixel smartphones, and smart home products such as Chromecast). Google's cloud computing platform accounts for roughly 10% of Alphabet's revenue. The firm's investments in up-and-coming technologies such as self-driving cars (Waymo), health (Verily), and internet access (Google Fiber) make up the rest.
Market cap 3.6T · 190,820 employees
Paccar Inc
↗PCAR
Paccar is a leading manufacturer of medium- and heavy-duty trucks under the premium nameplates Kenworth and Peterbilt, which are primarily sold in the Americas and Australia, and DAF, which primarily services Europe and South America. The trucks segment (74% sales) goes to market through a network of 2,200 independent dealers. Paccar maintains an internal finance subsidiary that provides retail and wholesale financing for customers and dealers (6% sales). In recent years, Paccar has aggressively expanded its parts business (20% of sales), including engines, axles, and transmissions for its own truck brands as well as independent producers. The company commands 30% of the Class 8 market share in North America and 15% of the heavy-duty market share in Europe.
Market cap 62.2B · 25,900 employees
Time Series
Rebased to 100
Who Moves First
in sync
GOOG and PCAR tend to move at the same time.
Best correlation after shifting: +0.695 (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
-0.204
15 periods · Return correlation when both series rose
Both Falling
+0.878
5 periods · Return correlation when both series fell
Diverging
-0.603
15 periods · Return correlation when series moved apart
R-Squared
48.3%
Share of variance in one series explained by the other.
Trend Agreement
60.5%
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: [0.665, 0.722]
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
Alphabet Inc. Class C Capital Stock
GOOG
Market cap 3.6T · 190,820 employees
Stock · 1,254 raw → 1,254 prepared
Series B
Paccar Inc
PCAR
Market cap 62.2B · 25,900 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
27
Estimated crossover points between normalized spreads.
Slope
0.2646
Linear regression slope.
Intercept
42.1613
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-goog-vs-stock-pcar-daily-20260408-rsa6rf