Correlation Analysis
Alphabet Inc. Class C Capital Stock vs S&P Global Inc.
GOOG vs SPGI
+0.656
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
S&P Global Inc.
↗SPGI
S&P Global provides data and benchmarks to capital and commodity market participants. Its ratings business is the largest credit rating agency in the world and S&P's largest segment by profitability. S&P's largest segment by revenue is market intelligence, which provides desktop, data and advisory solutions, enterprise solutions, and credit/risk solutions mostly in the financial-services industry. S&P's other segments include energy (formerly commodity insights, this segment includes Platts and other data), mobility (Carfax), and indexes. S&P plans to spin off mobility in 2026.
Market cap 128.5B · 44,500 employees
Time Series
Rebased to 100
Who Moves First
SPGI leads GOOG by 6 days
SPGI tends to move before GOOG.
Best correlation after shifting: +0.669 (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
+0.035
16 periods · Return correlation when both series rose
Both Falling
+0.373
5 periods · Return correlation when both series fell
Diverging
-0.478
14 periods · Return correlation when series moved apart
R-Squared
43.1%
Share of variance in one series explained by the other.
Trend Agreement
63.3%
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: [0.624, 0.687]
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
S&P Global Inc.
SPGI
Market cap 128.5B · 44,500 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
46
Estimated crossover points between normalized spreads.
Slope
0.7448
Linear regression slope.
Intercept
312.2817
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 3 hours ago · ID: stock-goog-vs-stock-spgi-daily-20260408-hnlp4k