Correlation Analysis
Costco Wholesale Corp vs PNC Financial Services Group
COST vs PNC
+0.368
Light 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
PNC Financial Services Group
↗PNC
PNC Financial is one of the three super-regional banks in the US, with around $574 billion in total assets at the end of Dec. 30, 2025. Headquartered in Pittsburgh, Pennsylvania, PNC Financial has a coast-to-coast branch network, with a strong presence in the US Midwest and Northeast. It closed its acquisition of FirstBank in January 2026, which added around $26 billion in assets to its balance sheet, and PNC is currently expanding in the Southern and Western regions of the US. The bank provides a diversified set of financial services in retail banking, commercial banking, card and treasury management, asset management, and investment banking. PNC derived around 38% of revenue from fee income and 62% from net interest income in 2025.
Market cap 86B · 55,333 employees
Time Series
Relative Performance
Who Moves First
COST leads PNC by 4 days
COST tends to move before PNC.
After testing 13 timing shifts, the strongest relationship was +0.369 (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
+0.299
14 periods · Return correlation when both series rose
Both Falling
+0.343
7 periods · Return correlation when both series fell
Diverging
-0.784
14 periods · Return correlation when series moved apart
R-Squared
13.6%
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: [0.320, 0.415]
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
PNC Financial Services Group
PNC
Market cap 86B · 55,333 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
0.0490
Linear regression slope.
Intercept
138.8178
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
PNC
PNC Financial Services Group
Highest
+0.656
Amazon.Com Inc
AMZN · 1,254 data points
Lowest
-0.116
Exxon Mobil Corporation
XOM · 1,254 data points
Saved 7 hours ago · ID: stock-cost-vs-stock-pnc-daily