Costco Wholesale Corp (COST): stock score 45/100

Costco Wholesale Corp (COST) scores 45 out of 100 (around average among 99 US stocks) on trend, stability, fundamentals, market backdrop and news tone. Every calculation step shown. Educational, not advice.

COST scores 45.5 out of 100 (around average), down 2.0 points from last week. Its fundamentals add the most (+1.3 points: revenue growth vs a year earlier: +10.1%). Its news tone weighs on it most (-6.2 points: average FinBERT sentiment -0.068 over 49 articles). Fundamentals have not yet been tested in our research.

How the score is built

Trend: 47/100 (-0.6 points)

1. Price is +7.9% vs its 100-day average → higher than 66% of the comparison group → 66
2. 12-1 month momentum -2.9% → higher than 28% of the comparison group → 28
3. Average of the two → trend score 47.0

Tested in our research: the trend rule did not hold up out of sample.

Stability: 54/100 (+0.8 points)

1. Forecast 20.4% vs normal 19.9% → ratio 1.02
2. Ratio is higher than 46% of the comparison group → 100 minus 46 → stability 54.0 (bigger expected swings than usual → lower stability)

A machine-learning volatility model beat HAR for the S&P 500 (p = 0.04); not yet tested on single stocks. This component uses HAR.

Fundamentals: 56/100 (+1.3 points)

1. Revenue growth vs a year earlier: +10.1% → higher than 61% of the comparison group → 61
2. Operating-margin change vs a year earlier: +0.1 pp → higher than 37% of the comparison group → 37
3. Change in leverage (1 - equity/assets) vs a year earlier: -2.4 pp → higher than 71% of the comparison group (lower is better) → 71
4. Average of available items → fundamentals score 56.4

Not yet tested in our research.

Market backdrop: 51/100 (+0.2 points)

1. VIX in its 5-year range: 60 after inverting (lower VIX → higher)
2. Breadth vs its 5-year range → 45
3. Credit trend vs its 5-year range → 15
4. Yield curve vs its 5-year range → 83
5. Average → backdrop score 50.8 (same for every stock)

Tested in our research: cross-asset indicators did not improve forecasts.

News tone: 19/100 (-6.2 points)

1. Average FinBERT sentiment -0.068 over 49 articles; shrunk towards 0 for few articles → tone -0.062
2. Tone vs this stock's own past year → news score 19.2

Tested in our research: news sentiment made predictions slightly worse.

COST score history (weekly)

Consumer discretionary stocks compared

• TGT: 52/100
• GM: 50/100
• CVS: 50/100
• NFLX: 49/100
• DIS: 48/100
• AMZN: 46/100
• COST: 45/100
• WMT: 45/100
• LOW: 41/100
• SBUX: 39/100
• HD: 38/100
• F: 33/100
• MCD: 29/100

Questions

What is Costco Wholesale Corp's (COST) Quantooo score today?

COST scores 45 out of 100 on 2026-10-22, around average among 99 US stocks. It ranks 66th of 99 overall and 7th of 13 in Consumer discretionary. It was 47 a week earlier.

What raises and lowers COST's score?

Fundamentals adds the most (56/100, +1.3 points) and news tone weighs on it most (19/100, -6.2 points). The score is 50 plus each part's weighted distance from 50.

Is COST stock volatile right now?

Our volatility model (HAR) expects annualised swings of 20.4% over the next 20 trading days, against a normal level of 19.9% for COST: about as calm as usual for this stock. Its stability score is 54/100 compared with the other 99 US stocks.

How are Costco Wholesale Corp's fundamentals changing?

Revenue growth vs a year earlier: +10.1%; Operating-margin change vs a year earlier: +0.1 pp; Change in leverage (1 - equity/assets) vs a year earlier: -2.4 pp. Fundamentals score: 56/100. From the 10-K filed 2026-10-07 (period to 2026-08-30).

Does the score predict COST's share price?

No. The score describes the stock's recent data; it is not a forecast of the share price. Our own tests found no reliable ability to rank stocks by future returns, and every test, including the failures, is published. Educational, not investment advice.

Sector: Consumer discretionary. Data as of 2026-10-22. Scores describe data; they are not recommendations or predictions. Educational, not investment advice.