Correlation Analysis
Costco Wholesale Corp vs Prudential Financial, Inc.
COST vs PRU
+0.452
Moderate positive
When one moves up, the other tends to follow.
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
Prudential Financial, Inc.
↗PRU
Prudential Financial is one of the largest US life insurers, offering annuities, life insurance, and asset-management products. The United States and Japan are its two largest markets. Its US business contributed about 50% of adjusted 2025 earnings and includes institutional retirement (mostly pension risk transfer), individual retirement (annuities), group insurance, and individual life insurance. Its international business represented about 39% of adjusted earnings, with a strong market position in Japan, and the firm also has a presence in emerging markets like Brazil. The company's investment management business, PGIM, contributed approximately 11% of its 2025 adjusted earnings. PGIM had around $1.47 trillion in assets under management at the end of fourth-quarter 2025.
Market cap 34B · 36,824 employees
Time Series
Relative Performance
Who Moves First
PRU leads COST by 6 days
PRU tends to move before COST.
After testing 13 timing shifts, the strongest relationship was +0.460 (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
+0.067
14 periods · Return correlation when both series rose
Both Falling
+0.236
7 periods · Return correlation when both series fell
Diverging
-0.788
14 periods · Return correlation when series moved apart
R-Squared
20.4%
Share of variance in one series explained by the other.
Trend Agreement
57.9%
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: [0.406, 0.495]
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
Costco Wholesale Corp
COST
Market cap 451.9B
Stock · 1,254 raw → 1,254 prepared
Series B
Prudential Financial, Inc.
PRU
Market cap 34B · 36,824 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
0.0219
Linear regression slope.
Intercept
90.0765
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 4 hours ago · ID: stock-cost-vs-stock-pru-daily