Correlation Analysis
Brown & Brown, Inc. vs Costco Wholesale Corp
BRO vs COST
+0.873
Very strong positive
When one moves up, the other tends to follow.
Brown & Brown, Inc.
↗BRO
Brown & Brown Inc is a diversified insurance agency, wholesale brokerage, insurance programs, and service. The company's business is divided into two reportable segments: (i) the Retail segment, and (ii) the Specialty Distribution segment. The Retail segment provides a broad range of insurance products and services to commercial, public and quasi-public entities, and to professional and individual customers, as well as non-insurance warranty services and products through automobile and recreational vehicle dealer services businesses. The Specialty Distribution segment consists of wholesale brokerage and specialty businesses. Its geographic area is U.S, U.K and Others.
Market cap 22.6B · 22,888 employees
Costco Wholesale Corp
↗COST
Founded in 1983, Costco Wholesale now operates a global chain of membership-based warehouse clubs, delivering high-quality goods and services at consistently low prices. As of its most recent fiscal year, Costco operated approximately 910 warehouses, serving more than 80 million members across its three geographic segments: Costco US (approximately 73% of total revenue), Costco Canada (13%), and Costco International (14%).Costco's core value proposition—quality products at unbeatable prices—has yielded consistently strong member renewal rates (93% in the US and Canada and nearly 90% internationally). About 55% of Costco's fiscal 2025 revenue came from its grocery offerings, and another 25% from general merchandise.
Market cap 451.9B
Time Series
Relative Performance
Who Moves First
BRO leads COST by 6 days
BRO tends to move before COST.
After testing 13 timing shifts, the strongest relationship was +0.880 (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
+0.139
18 periods · Return correlation when both series rose
Both Falling
+0.496
8 periods · Return correlation when both series fell
Diverging
-0.693
9 periods · Return correlation when series moved apart
R-Squared
76.1%
Share of variance in one series explained by the other.
Trend Agreement
65.0%
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: [0.859, 0.885]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,254 paired data points 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
Brown & Brown, Inc.
BRO
Market cap 22.6B · 22,888 employees
Stock · 1,254 raw → 1,254 prepared
Series B
Costco Wholesale Corp
COST
Market cap 451.9B
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
9.6468
Linear regression slope.
Intercept
-59.0568
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 4 hours ago · ID: stock-bro-vs-stock-cost-daily