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Costco is one of the world's largest retailers, running membership-only warehouse stores that sell groceries, household goods, electronics and more, often in bulk. This contract tracks the price of Costco stock (COST). Annual membership fees make up a large share of its profit, so results depend on how many members join and renew and how much they spend. Competition from other retailers and the cost of the goods it sells also play a role.
What to watch: Quarterly earnings, monthly sales reports, and membership renewal rates.