Correlation Analysis
BERKSHIRE HATHAWAY Class B vs Toast, Inc.
BRK.B vs TOST
+0.508
Moderate positive
When one moves up, the other tends to follow.
BERKSHIRE HATHAWAY Class B
↗BRK.B
Berkshire Hathaway is a holding company with a wide array of subsidiaries engaged in diverse activities. The firm's core business segment is insurance, run primarily through Geico, Berkshire Hathaway Reinsurance Group, and Berkshire Hathaway Primary Group. Berkshire has used the excess cash thrown off from its operations to acquire Burlington Northern Santa Fe (railroad), Berkshire Hathaway Energy (utilities and energy distributors), and the companies that make up its manufacturing, service, and retailing operations (which include Precision Castparts, Lubrizol, Clayton Homes, Marmon, and IMC/ISCAR). The conglomerate is unique in that it is run on a completely decentralized basis. Berkshire is expected to generate close to $375 billion in revenue in 2025.
Market cap 1T
Toast, Inc.
↗TOST
Toast Inc is a cloud-based, all-in-one digital technology platform purpose-built for the restaurant community. The company provides a comprehensive platform of software-as-a-service (SaaS) products and financial technology solutions, including integrated payment processing, restaurant-grade hardware, and a broad ecosystem of third-party partners. It serves as a restaurant operating system, connecting front of house and back of house operations across service models such as dine-in, takeout, and delivery. It operates through one reportable segment consisting of its SaaS products, financial technology solutions, integrated payments, hardware, and partner ecosystem.
Market cap 15.9B · 6,500 employees
Time Series
Relative Performance
Who Moves First
BRK.B leads TOST by 6 days
BRK.B tends to move before TOST.
After testing 13 timing shifts, the strongest relationship was +0.538 (they moved in the same direction).
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
+0.117
12 periods · Return correlation when both series rose
Both Falling
-0.071
6 periods · Return correlation when both series fell
Diverging
-0.495
17 periods · Return correlation when series moved apart
R-Squared
25.8%
Share of variance in one series explained by the other.
Trend Agreement
60.7%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,139
Deep shared window — 1,139 usable pairs.
Significance
p < 0.001
95% CI: [0.464, 0.550]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,139 paired data points survived the daily window.
Raw input
1,254
1,139
Normalized
1,254
1,139
Prepared
1,254
1,139
Aligned
1,139
1,139
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
115
A: 115 / B: 0
Series A
BERKSHIRE HATHAWAY Class B
BRK.B
Market cap 1T
Stock · 1,254 raw → 1,254 prepared
Series B
Toast, Inc.
TOST
Market cap 15.9B · 6,500 employees
Stock · 1,139 raw → 1,139 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
1
Estimated crossover points between normalized spreads.
Slope
0.0642
Linear regression slope.
Intercept
2.4510
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-brk-b-vs-stock-tost-daily