MarketPR
Costco Wholesale (COST) shares recorded a beta of -0.14 and a daily correlation of -0.09 with the S&P 500 over the twelve months to October 14, 2026, indicating the stock moved inversely to the index with almost no linear relationship.
This statistical decoupling occurred while the retailer's underlying business metrics showed accelerated growth, with revenue rising 10.1% in the twelve months to August 2026, up from 8.2% growth a year earlier.
The divergence between the stock's price action and the broader market is evident in specific daily performance data.
On the S&P 500's average down day over the past year, where the index lost 0.585%, a $10,000 holding in Costco increased in value by approximately $3.68.
Keep reading