AAPL Apple $152.55 TSLA Tesla $289.38 UNH UnitedHealth $517.28 V Visa $185.52 COST Costco $486.84 KO Coca-Cola $59.62 BAC Bank of America $32.56 Apple (AAPL) Source: sylv1rob1 / Shutterstock.com Consumer electronics giant Apple (NASDAQ:AAPL) remains the biggest stock in the S&P 500 index by weighting. Costco (COST) Source: ilzesgimene / Shutterstock.com Big-box retailer Costco (NASDAQ:COST) is a reliable bet in any economy. As inflation has pushed consumer prices sharply higher, people continue to turn to Costco for deals.