Correlation Analysis
Costco Wholesale Corp vs RBC Bearings Incorporated
COST vs RBC
+0.846
Strong 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
RBC Bearings Incorporated
↗RBC
RBC Bearings Inc is an international manufacturer and marketer of engineered precision bearings, components, and essential systems for the industrial, defense, and aerospace industries. The offering includes plain bearings, roller bearings, ball bearings, and engineered products. The company has two reportable segments: Industrial, which derives maximum revenue, and Aerospace/Defense. The Aerospace/Defense segment represents the end markets for the company's engineered bearings and precision components used in commercial aerospace, defense aerospace, and sea and ground defense applications; and the Industrial segment represents the end markets for its products used in various industrial applications. Geographically, the company generates a majority of its revenue from the United States.
Market cap 17.5B · 5,334 employees
Time Series
Relative Performance
Who Moves First
in sync
COST and RBC tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.846 (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
+0.362
13 periods · Return correlation when both series rose
Both Falling
+0.844
5 periods · Return correlation when both series fell
Diverging
-0.662
17 periods · Return correlation when series moved apart
R-Squared
71.5%
Share of variance in one series explained by the other.
Trend Agreement
58.1%
How often both series moved in the same direction period-to-period.
Overlap Quality
1,009
Deep shared window — 1,009 usable pairs.
Significance
p < 0.001
95% CI: [0.827, 0.862]
Scatter
XY Regression
Pipeline
Data quality details
Pipeline
Data quality details
Pipeline Summary
1,009 paired data points survived the daily window.
Raw input
1,254
1,009
Normalized
1,254
1,009
Prepared
1,254
1,009
Aligned
1,009
1,009
Invalid removed
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
245
A: 245 / B: 0
Series A
Costco Wholesale Corp
COST
Market cap 451.9B
Stock · 1,254 raw → 1,254 prepared
Series B
RBC Bearings Incorporated
RBC
Market cap 17.5B · 5,334 employees
Stock · 1,009 raw → 1,009 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
17
Estimated crossover points between normalized spreads.
Slope
0.3882
Linear regression slope.
Intercept
7.8087
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
Saved 6 hours ago · ID: stock-cost-vs-stock-rbc-daily