Costco Wholesale Corp
COST
Costco Wholesale Corporation (doing business as Costco Wholesale and also known simply as Costco) is an American multinational corporation which operates a chain of membership-only (needing a membership to shop there) big-box retail stores. As of 2020, Costco was the fifth largest retailer in the world, and the world's largest retailer of choice and prime beef, organic foods, rotisserie chicken, and wine as of 2016.
How the rating is built — each factor's weight × signal contributes to the composite; the contributions sum to the overall score. A factor with no data counts as neutral, so it neither helps nor hurts.
Fair Value
weight 0.3
How far today's price sits from the model's 6-month fair value estimate, ranked against companies of similar size.
+18.8% vs fair value (90th pct of mega caps)
+28.4
Seasonal Forecast · 90d
weight 0.2
The seasonal price model projected 90 days out, as an expected return. It reads this stock's own price history and repeating calendar cycles — not company news, earnings, or business quality. Same model as the 30-day factor below, read at a longer horizon.
+33.9% expected
+23.5
Chart Signal
informational · no weight
A machine-learning classifier reading momentum and trend structure across daily and weekly price bars. Needs about 5 years of trading history. Shown for information only: it reads roughly five days ahead, shorter than the score's horizon, so it carries no weight in the AI Score.
+0.14
+0.0
Fundamentals
weight 0.12
Reported results, not projections: revenue growth, operating margin, and free cash flow measured against market value. Loss-making or cash-burning companies score negative here.
revenue +6%, margin 4%, FCF yield +2.3%
+3.4
P/E vs History
weight 0.08
Today's price-to-earnings against this company's own trailing average, in standard deviations. Needs positive earnings.
P/E 45.0 vs 36.6 avg (+0.8σ)
-3.6
Analyst Consensus
weight 0.08
Wall Street consensus ratings, weighted by conviction.
consensus
+5.8
Seasonal Forecast · 30d
weight 0.04
The same seasonal price model as the 90-day factor above, read 30 days out. A near-term and a medium-term view of one forecast, which is why they can disagree.
+24.8% 30d
+4.7
Volatility
weight 0.03
An annualized volatility penalty. High volatility lowers the score; low volatility never raises it.
0.27 ann.
+0.0
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Cyclical regression model price trajectory and target range, updated each trading day.
Seasonality
Historical seasonal patterns across monthly and weekly windows to contextualize current timing.
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Questions about COST
Is COST overvalued or undervalued right now?
As of Sep 18, 2026, ŷRobot's fair-value model estimates Costco Wholesale Corp (COST) at $1063.49 against a last close of $895.31, implying 18.8% upside to the model's estimate.
Is COST's chart signal bullish or bearish?
The chart-signal model classifies COST as Neutral as of Sep 18, 2026, with a signal score of 0.14 on a -1 to 1 scale.
What is COST's ŷRobot AI score?
COST scores 81 out of 100 on ŷRobot's AI composite, which measures how strongly the fair-value and chart models agree, as of Sep 18, 2026.
Is COST stock expensive on P/E and P/S?
COST trades at 47.0 times earnings and 1.4 times sales as of Sep 18, 2026.
What does COST's seasonal forecast show?
ŷRobot's seasonal forecast curve for COST reads +24.8% at 30 days, +33.9% at 90 days, and +52.1% at one year as of Sep 18, 2026. Seasonal tendencies are historical patterns, not predictions.
How fast is COST growing?
Costco Wholesale Corp's revenue growth is +6.3% and free-cash-flow growth is -5.5% on the latest reported figures.
What this is (and isn’t)
These outputs are generated by machine learning models trained on historical price, fundamental, and volume data. The models summarize historical data and current model outputs — they do not predict the future or constitute personalized investment advice. All figures are updated on a regular cadence and reflect the most recent available data at time of generation.
ŷRobot provides research and information, not personalized financial advice. Past performance is not a guarantee of future results.