Best- and Worst-Performing Stocks

The Morningstar US Large-Cap Index fell 1.02% in October, amid a struggle in the communication services sector. The index tracks the performance of the top 85% of the US investable universe by market cap, and each month, we screen it for the best- and worst-performing companies. Data in this article is sourced from Morningstar Direct.

The Best-Performing Stocks of October 2026

1. Accenture ACN
2. Equifax EFX
3. Roper Technologies ROP
4. Crown Castle CCI
5. Dow DOW

The Worst-Performing Stocks of October 2026

1. Intel INTC
2. Cerebras Systems CBRS
3. CoreWeave CRWV
4. Reddit RDDT
5. Sandisk SNDK

Metrics for the Best-Performing Stocks

Accenture ACN

• Sector: Technology
• Industry: Information Technology Services
• Economic Moat: Narrow

Accenture climbed 41.96% in October, leaving shares up 6.85% for the past year. Accenture has a Morningstar Rating of 3 stars, with its stock trading at a 14% premium to its $226 per share fair value estimate.

Equifax EFX

• Sector: Industrials
• Industry: Consulting Services
• Economic Moat: Narrow

Equifax soared 34.51% in October, but was down 11.54% over the past year. The stock has a Morningstar Rating of 3 stars and trades near its fair value estimate of $190 per share.

Roper Technologies ROP

• Sector: Technology
• Industry: Software - Application
• Economic Moat: None

Roper climbed 33.88% in October, leaving shares up 5.61% for the past year. Roper has a Morningstar Rating of 3 stars, with its stock trading at an 11% premium to its fair value estimate of $420 per share.

Crown Castle CCI

• Sector: Real Estate
• Industry: REIT - Specialty
• Economic Moat: Narrow

Crown Castle soared 33.07% in October, leaving it up 3.36% for the past year. The stock has a Morningstar Rating of 4 stars and trades at a 22% discount to its fair value estimate of $113 per share.

Dow DOW

• Sector: Basic Materials
• Industry: Chemicals
• Economic Moat: None

Dow jumped 26.00% in October, leaving it up 52.59% for the past year. The stock has a Morningstar Rating of 3 stars, trading at an 8% premium to its fair value estimate of $32 per share.

Metrics for the Worst-Performing Stocks

Intel INTC

• Sector: Technology
• Industry: Semiconductors
• Economic Moat: None

Intel sank 45.30% in October, but shares were still up 64.44% for the past year. Shares were 53.80% lower than their last high on June 30, 2026. The stock has a Morningstar Rating of 3 stars and trades at a 23% discount to its fair value estimate of $85 per share.

Cerebras Systems CBRS

• Sector: Technology
• Industry: Semiconductors
• Economic Moat: Not Rated

Cerebras plunged 38.54% in October. Shares were 71.74% below their last high on May 14, 2026. The stock has a quantitative Morningstar Rating of 3 stars. It was listed on the Nasdaq - All Markets on May 14, 2026.

CoreWeave CRWV

• Sector: Technology
• Industry: Software - Infrastructure
• Economic Moat: None

CoreWeave dove 37.02% in October, leaving shares down 58.96% for the past year. Shares were 60.34% below the last high on Oct. 31, 2025. CoreWeave has a Morningstar Rating of 4 stars, trading at a 49% discount to its fair value estimate of $108 per share.

Reddit RDDT

• Sector: Communication Services
• Industry: Internet Content & Information
• Economic Moat: Narrow

Reddit sank 35.60% in October, leaving the stock down 56.10% for the past year. Shares were 65.19% lower than their last high on Jan. 9, 2026. The stock has a Morningstar Rating of 4 stars and trades at a 48% discount to its fair value estimate of $175 per share.

SanDisk SNDK

• Sector: Technology
• Industry: Computer Hardware
• Economic Moat: None

SanDisk dove 33.85% in October, but shares still grew 477.38% over the past year. Shares were 51.12% below the last high on June 22, 2026. SanDisk has a Morningstar Rating of 2 stars, trading at a 32% premium to its fair value estimate of $870 per share.

Companies not formally covered by a Morningstar analyst are statistically matched to analyst-rated companies, allowing our models to calculate a quantitative star rating.