Why Is Costco Wholesale Corporation (COST) Stock Trading Flat Today?
AI-sourced movement explanations, refreshed three times each trading day · Latest: July 3, 2026
Costco Stock Flat as Markets Observe Independence Day Holiday
The Full Story
Costco's stock remained unchanged today, closing at $951.67 with zero trading volume. This neutral performance is attributed to the closure of U.S. markets in observance of the Independence Day holiday, aligning with the sector's 0.00% average change.
What's Driving the Move
Market Holiday
U.S. stock markets were closed today, July 3, 2026, in observance of the Independence Day holiday, resulting in no trading activity for Costco.
Previous Sessions
A running log of what moved COST each trading day.
| Date | Move | What Happened |
|---|---|---|
| Jul 2 | ▲ +2.96% | Costco Shares Rise, Outperforming Sector Average |
| Jul 1 | ▼ -1.16% | Costco Shares Dip Amid Concerns Over Growth Prospects |
| Jun 30 | ▼ -1.20% | Costco Dips Slightly, Outperforming Broader Sector Decline |
| Jun 29 | ▼ -0.66% | Costco Shares Edge Lower, Outperforming Broader Sector Decline |
| Mar 31 | ▼ -0.15% | Costco (COST) dips slightly despite positive outlook, new gas station announcement. |
| Mar 30 | ▲ +1.31% | Costco (COST) Rises on Expansion Plans and Private-Label Growth |
| Mar 27 | ▲ +0.46% | Costco (COST) gains slightly amid analyst optimism and expansion news |
| Mar 26 | ▲ +0.53% | Costco (COST) Up Slightly Amidst Mixed Sector Performance |
| Mar 25 | — +0.07% | Costco (COST) edges up slightly amid sector gains |
| Mar 24 | ▲ +0.81% | Costco (COST) Rises Slightly Amidst Mixed Analyst Sentiment |
| Mar 23 | ▼ -0.67% | Costco (COST) dips slightly amid broader sector gains |
| Mar 20 | ▼ -0.25% | Costco (COST) dips slightly amid broader sector decline |
| Mar 19 | ▼ -0.52% | Costco (COST) dips slightly amid mixed signals, sector weakness |
| Mar 18 | ▼ -1.63% | Costco (COST) dips amid mixed sentiment, salmonella recall |
Frequently Asked Questions
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Methodology
Each trading day we pair COST’s price and volume action with same-day news coverage, earnings events, analyst actions, and sector context, then generate a sourced explanation using AI with live search grounding. Updates run shortly after the open, midday, and after the close — intraday versions are marked preliminary.
Moves are flagged significant based on their size relative to the stock’s typical daily range. Explanations describe what plausibly drove a move; markets don’t always have a single clean cause.
Not Financial Advice
This page is for education and information only. Indicators are mechanical calculations, AI commentary can contain errors, and nothing here is a recommendation to buy or sell any security. Do your own research and consider consulting a qualified financial advisor. See our full disclaimer.
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