Correlation Analysis
Costco Wholesale Corp vs The Charles Schwab Corporation
COST vs SCHW
+0.500
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
The Charles Schwab Corporation
↗SCHW
Charles Schwab is one of the largest retail-oriented financial-services companies in the US, with $11.9 trillion in client assets across its brokerage, banking, asset management, custody, financial advisory, and wealth-management businesses at the end of 2025. While best known for its retail brokerage offering, Schwab generates the lion's share of its revenue and profits through its Charles Schwab Bank and asset management segments. The firm is a dominant player in registered investment advisor custody, with over 40% market share, and has recently pushed into wealth management with robo-advisory, direct indexing, and other managed-investment solutions.
Market cap 161.6B · 33,000 employees
Time Series
Relative Performance
Who Moves First
in sync
COST and SCHW tend to move at the same time.
After testing 13 timing shifts, the strongest relationship was +0.500 (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
+0.291
12 periods · Return correlation when both series rose
Both Falling
N/A
4 periods · Return correlation when both series fell
Diverging
-0.606
19 periods · Return correlation when series moved apart
R-Squared
25.0%
Share of variance in one series explained by the other.
Trend Agreement
57.1%
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: [0.458, 0.541]
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
The Charles Schwab Corporation
SCHW
Market cap 161.6B · 33,000 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
0.0305
Linear regression slope.
Intercept
54.3598
Linear regression intercept.
Related Extremes
Highest and Lowest Correlated
COST
Costco Wholesale Corp
Highest
+0.977
Republic Services Inc.
RSG · 1,254 data points
Lowest
-0.912
Fiserv, Inc. Common Stock
FISV · 644 data points
SCHW
The Charles Schwab Corporation
Highest
+0.684
JPMorgan Chase & Co.
JPM · 1,254 data points
Lowest
+0.167
Exxon Mobil Corporation
XOM · 1,254 data points
Saved 7 hours ago · ID: stock-cost-vs-stock-schw-daily