Passive investing in an index fund is a good way to ensure your own returns roughly match the overall market. Active investors aim to buy stocks that vastly outperform the market - but in the process, they risk under-performance. Investors in Ero Copper Corp. (TSE:ERO) have tasted that bitter downside in the last year, as the share price dropped 48%. That falls noticeably short of the market return of around 7.8%. Longer term shareholders haven't suffered as badly, since the stock is down a comparatively less painful 24% in three years. Shareholders have had an even rougher run lately, with the share price down 28% in the last 90 days.

Given the past week has been tough on shareholders, let's investigate the fundamentals and see what we can learn.

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To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

During the last year Ero Copper saw its earnings per share drop below zero. While this may prove temporary, we'd consider it a negative, so it doesn't surprise us that the stock price is down. We hope for shareholders' sake that the company becomes profitable again soon.

You can see how EPS has changed over time in the image below (click on the chart to see the exact values).TSX:ERO Earnings Per Share Growth April 10th 2025

We consider it positive that insiders have made significant purchases in the last year. Even so, future earnings will be far more important to whether current shareholders make money. This free interactive report on Ero Copper's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

A Different Perspective

While the broader market gained around 7.8% in the last year, Ero Copper shareholders lost 48%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. On the bright side, long term shareholders have made money, with a gain of 3% per year over half a decade. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Consider risks, for instance. Every company has them, and we've spotted  1 warning sign for Ero Copper  you should know about.

Story Continues

If you like to buy stocks alongside management, then you might just love this freelist of companies. (Hint: most of them are flying under the radar).

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on Canadian exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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