Costco (NASDAQ: COST | COST Price Prediction) closed at $1,008.79 a share on May 8, 2026, leaving the warehouse giant perched just above the psychologically loaded $1,000 line. The setup is what makes the “Sell in May and Go Away” adage worth a fresh look on a name most investors think of as bulletproof.
The Setup That Triggers the Question
Costco is up 17.0% year to date, despite being only 0.1% higher over the trailing twelve months. Essentially, the recent gain has come on a defensive name already trading at a 52 trailing P/E and roughly 46 on a forward basis, with a PEG of 5 and price-to-book near 14. That is one of the richest multiples in retail.
Add a macro wobble. University of Michigan consumer sentiment fell to a historical record low of 48.2 in May 2026, deep in pessimistic territory. Insiders have been trimming their positions too: four executive vice presidents sold stock between March 9 and April 1, 2026, at prices between $991 and $1,003.
The Trim Case
The case for trimming practically writes itself. An outsized year-to-date move on a low-beta compounder (beta 0.908) raises the bar for the back half. Comps are tougher to lap after +7.4% Q2 FY26 comps and an April net sales print of $23.92 billion, up 13.0% year over year. And $1,000 has acted as a ceiling before, with shares briefly touching it in May 2025 only to drift lower into year-end.
The Counter: Gold-Standard Compounder
Paid memberships hit 82.1 million, with an 89.7% worldwide renewal rate, and membership fee income grew 13.6% to $1.355 billion. CFO Gary Millerchip described the consumer this way on the Q2 earnings call: “Members are focused on quality, value, and new, exciting items. When we meet these expectations, members seem willing and able to spend.”
Summer is also peak warehouse season, and analyst targets keep climbing: Deutsche Bank is at $1,106, Goldman at $1,088, Bank of America at $1,185. Our internal model pegs a 12-month base case of $1,061.16, with a bull case of $1,125.98 and a bear case of $970.07.
How to Think About It at $1,000
Selling a long-term compounder on a seasonal hunch has historically been an expensive habit. Some considerations investors often weigh:
- Whether the position size is still appropriate after an outsized run
- How the premium multiple compares to historical ranges and peer retailers
- Where prior support has formed, such as the 200-day moving average near $952 or the $844.06 52-week low, as reference levels for valuation discussions
Costco at $1,000 is a much harder sell than a high-beta cyclical. Keep an eye on the stock into the next comp print and the summer warehouse season for the next read on demand.
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