Correlation Analysis
Costco Wholesale Corp vs News Corporation Class B Common Stock
COST vs NWS
+0.860
Very 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
News Corporation Class B Common Stock
↗NWS
News Corporation is a diversified media conglomerate with big presence in the US, the UK, and Australia. Key mastheads include The Wall Street Journal, Barron's, New York Post, The Times, The Sun, The Australian, Herald Sun, and The Daily Telegraph. Its 61%-owned REA Group is the dominant property listings platform in Australia. In addition, it owns Harper Collins, one of the largest book publishers in the world, and has a sizable US digital property advertising business, Move. The 65% interest in Foxtel, the Australian pay-TV and streaming provider, was sold in April 2025. The sale to global sports streaming platform, DAZN, was struck at more than 7 times Foxtel's EBITDA.
Market cap 15.5B · 22,300 employees
Time Series
Relative Performance
Who Moves First
COST leads NWS by 4 days
COST tends to move before NWS.
After testing 13 timing shifts, the strongest relationship was +0.860 (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
+0.627
15 periods · Return correlation when both series rose
Both Falling
+0.923
8 periods · Return correlation when both series fell
Diverging
-0.795
12 periods · Return correlation when series moved apart
R-Squared
74.0%
Share of variance in one series explained by the other.
Trend Agreement
59.1%
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: [0.845, 0.874]
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
News Corporation Class B Common Stock
NWS
Market cap 15.5B · 22,300 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
0.0212
Linear regression slope.
Intercept
10.1600
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
NWS
News Corporation Class B Common Stock
Highest
+0.927
NetFlix Inc
NFLX · 1,254 data points
Lowest
+0.046
Johnson & Johnson
JNJ · 1,254 data points
Saved 6 hours ago · ID: stock-cost-vs-stock-nws-daily