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Sifting through countless of stocks in the Metals & Mining industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in MP Materials Corp. or Ero Copper Corp. because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.
Read on to learn how MP Materials Corp. and Ero Copper Corp. compare based on key financial metrics to determine which better meets your investment needs.
About MP Materials Corp. and Ero Copper Corp.
MP Materials Corp., together with its subsidiaries, produces rare earth materials in the Western Hemisphere. The company operates in two segments, Materials and Magnetics. The Materials segment owns and operates the Mountain Pass Rare Earth Mine and Processing facility located near Mountain Pass, San Bernardino County, California. The Magnetics segment produces magnetic precursor products. The company was founded in 2017 and is headquartered in Las Vegas, Nevada.
Ero Copper Corp. engages in the exploration, development, and production of mining projects in Brazil. Its flagship asset includes Caraíba operations that comprise the production and sale of copper concentrates located in northeastern Bahia State, Brazil, as well as gold and silver produced and sold as by-products. The company was incorporated in 2016 and is headquartered in Vancouver, Canada.
Latest Metals & Mining and MP Materials Corp., Ero Copper Corp. Stock News
As of November 21, 2025, MP Materials Corp. had a $9.8 billion market capitalization, compared to the Metals & Mining median of $1.6 million. MP Materials Corp.’s stock is up 277.9% in 2025, up 3.4% in the previous five trading days and up 206.72% in the past year.
Currently, MP Materials Corp. does not have a price-earnings ratio. MP Materials Corp.’s trailing 12-month revenue is $232.7 million with a -50.5% net profit margin. Year-over-year quarterly sales growth most recently was -14.8%. Analysts expect adjusted earnings to reach $-0.273 per share for the current fiscal year. MP Materials Corp. does not currently pay a dividend.
As of November 21, 2025, Ero Copper Corp. had a $2.2 billion market cap, putting it in the 58th percentile of all stocks. Ero Copper Corp.’s stock is up 65.6% in 2025, up 3.9% in the previous five trading days and up 34.08% in the past year.
Currently, Ero Copper Corp.’s price-earnings ratio is 16.2. Ero Copper Corp.’s trailing 12-month revenue is $588.2 million with a 23.4% net profit margin. Year-over-year quarterly sales growth most recently was 41.9%. Analysts expect adjusted earnings to reach $2.089 per share for the current fiscal year. Ero Copper Corp. does not currently pay a dividend.
How We Compare MP Materials Corp. and Ero Copper Corp. Stock Grades
Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.
AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at MP Materials Corp. and Ero Copper Corp.’s stock grades to see how they measure up against one another.
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