Correlation Analysis
Costco Wholesale Corp vs KLA Corporation Common Stock
COST vs KLAC
+0.831
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
KLA Corporation Common Stock
↗KLAC
KLA is one of the largest semiconductor wafer fabrication equipment, or WFE, manufacturers in the world. It specializes in the market segment of semiconductor process control, wherein machines inspect semiconductor wafers during research and development and manufacturing for defects and verify precise measurements. In this section of the market, KLA holds a majority share. It also has a small exposure to the etch and deposition segments of the WFE market. It counts as top customers the largest chipmakers in the world, including TSMC and Samsung.
Market cap 201.9B · 15,200 employees
Time Series
Relative Performance
Who Moves First
KLAC leads COST by 5 days
KLAC tends to move before COST.
After testing 13 timing shifts, the strongest relationship was +0.832 (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
+0.726
16 periods · Return correlation when both series rose
Both Falling
+0.986
6 periods · Return correlation when both series fell
Diverging
-0.544
13 periods · Return correlation when series moved apart
R-Squared
69.1%
Share of variance in one series explained by the other.
Trend Agreement
62.3%
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: [0.814, 0.848]
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
KLA Corporation Common Stock
KLAC
Market cap 201.9B · 15,200 employees
Stock · 1,254 raw → 1,254 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
72
Estimated crossover points between normalized spreads.
Slope
1.2018
Linear regression slope.
Intercept
-209.6952
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
KLAC
KLA Corporation Common Stock
Highest
+0.920
Walmart Inc. Common Stock
WMT · 1,254 data points
Lowest
+0.707
Exxon Mobil Corporation
XOM · 1,254 data points
Saved 6 hours ago · ID: stock-cost-vs-stock-klac-daily