The Morningstar Canada Large-Mid Cap Index rose 2.98% in August amid a rally in the basic materials sector. The index tracks the top 90% of the Canadian 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 August 2026
The Worst-Performing Stocks of August 2026
- RB Global RBA
- Element Fleet Management EFN
- Bombardier BBD.B
- Celestica CLS
- Brookfield Infrastructure Partners BIPC
Metrics for the Best-Performing Stocks
Almonty Industries ALM
- Sector: Basic Materials
- Industry: Other Industrial Metals & Mining
- Economic Moat: Not Rated
Almonty surged 59.04% in August, leaving it up 303.89% for the past year. The stock has a quantitative Morningstar Rating of 2 stars.
Eldorado Gold ELD
- Sector: Basic Materials
- Industry: Gold
- Economic Moat: Not Rated
Eldorado soared 46.73% in August, leaving it up 83.03% for the past year. The stock has a quantitative Morningstar Rating of 2 stars.
SSR Mining SSRM
- Sector: Basic Materials
- Industry: Gold
- Economic Moat: Not Rated
SSR surged 45.48% in August, leaving it up 96.75% for the past year. The stock has a quantitative Morningstar Rating of 2 stars.
B2Gold BTO
- Sector: Basic Materials
- Industry: Gold
- Economic Moat: Not Rated
B2Gold soared 44.76% in August, leaving it up 36.47% for the past year. The stock has a quantitative Morningstar Rating of 3 stars.
Iamgold IMG
- Sector: Basic Materials
- Industry: Gold
- Economic Moat: Not Rated
Iamgold climbed 42.89% in August, leaving it up 121.66% for the past year. Iamgold has a quantitative Morningstar Rating of 2 stars.
Metrics for the Worst-Performing Stocks
RB Global RBA
- Sector: Industrials
- Industry: Specialty Business Services
- Economic Moat: Narrow
RB Global tumbled 23.42% in August, leaving shares down 24.48% for the past year. Shares were 29.55% below their last high on June 30, 2026. RB Global has a Morningstar Rating of 4 stars, trading at a 17% discount to its fair value estimate of C$142 per share.
Element Fleet Management EFN
- Sector: Industrials
- Industry: Rental & Leasing Services
- Economic Moat: Not Rated
Element dropped 16.24% in August, leaving it down 26.75% for the past year. Shares were 31.13% lower than their last high on Oct. 28, 2025. The stock has a quantitative Morningstar Rating of 5 stars.
Bombardier BBD.B
- Sector: Industrials
- Industry: Aerospace & Defense
- Economic Moat: Narrow
Bombardier slid 11.22% in August, though it’s still up 86.75% over the past year. Shares were 20.63% below their last high on July 27, 2026. The stock has a Morningstar Rating of 3 stars, trading at a 6% premium to its fair value estimate of C$284 per share.
Celestica CLS
- Sector: Technology
- Industry: Electronic Components
- Economic Moat: Not Rated
Celestica tumbled 10.35% in August but still grew 55.45% over the past year. Shares were 36.56% below their last high on June 2, 2026. Celestica has a quantitative Morningstar Rating of 3 stars.
Brookfield Infrastructure Partners BIPC
- Sector: Utilities
- Industry: Utilities - Regulated Gas
- Economic Moat: Not Rated
Brookfield fell 9.38% in August but was unmoved for the year. Shares were 24.24% lower than their last high on Feb. 12, 2026. The stock has a quantitative Morningstar Rating of 5 stars.
Companies not formally covered by a Morningstar analyst are statistically matched to analyst-rated companies, allowing our models to calculate a quantitative star rating.
