New York, January 11, 2026, 11:08 EST — The market has closed.
- Costco shares ended Friday up 1.1%.
- Jan. 14 is the date for U.S. Supreme Court rulings, including the unresolved tariff case involving Trump.
- Costco’s shareholder meeting is set for Jan. 15, followed by a sales update on Feb. 4.
The U.S. Supreme Court will deliver its next batch of rulings on Jan. 14, leaving a challenge to President Donald Trump’s broad tariffs still in play as traders prepare for the week. The court heard arguments on the tariffs back on Nov. 5 but hasn’t indicated if this case will be included in that day’s decisions. 1
U.S. markets are closed on Sunday, leaving the tariff case as one of the rare, well-defined catalysts for big-box retailers ahead of Monday’s session. Investors are weighing if this will be a quick headline shock or a gradual change that affects costs and pricing over time.
Costco Wholesale Corp (COST.O) has a lot riding on this, as the result could reshape import conditions across the entire sector. This kind of high-stakes legal decision can shake up a “defensive” retailer’s stock far beyond a typical news story.
Costco shares closed Friday $9.63 higher, rising 1.1% to $924.88. During the session, the stock fluctuated between $911.43 and $929.66.
U.S. Treasury Secretary Scott Bessent told Reuters the Treasury currently holds nearly $774 billion in cash and can handle any court-ordered tariff refunds. However, he noted repayments might stretch over weeks or even up to a year. “It’s just a corporate boondoggle,” Bessent said, adding, “Costco, who’s suing the U.S. government, are they going to give the money back to their clients?” 2
Costco continues to expand beyond the courtroom. A new warehouse in Forney, Texas, near Dallas, is slated to open in March, according to local reports and listings on Costco’s website. Alongside it, a fuel station is under construction. 3
Costco’s calendar has some key dates ahead: the annual shareholders meeting on Jan. 15, a sales update set for Feb. 4, and the fiscal second-quarter earnings call coming March 5.
Competition in warehouses hardly ever pauses. Costco’s model keeps clashing with Walmart’s Sam’s Club and BJ’s Wholesale Club when it comes to pricing, fuel costs, and member benefits. Any tariff changes would hit all three players alike.
Traders are expected to focus on the Supreme Court docket as the primary driver, viewing other factors as background. A win there won’t guarantee improved margins, but it could reshape the conversation around costs and the debate over “pass-through”—the share of tariffs that actually shows up in retail prices.
The downside is clear-cut: the court might uphold the tariffs or hand down a limited ruling that prolongs uncertainty. Even if importers prevail, refunds could face delays, disputes, or extended legal battles.
Costco stock faces its first hurdle with the Supreme Court opinions due Jan. 14. After that, all eyes turn to the shareholders meeting on Jan. 15 for any clues.
