Shareholders in Samsung SDI (KRX:006400) are in the red if they invested three years ago

While not a mind-blowing move, it is good to see that the Samsung SDI Co., Ltd. (KRX:006400) share price has gained 15% in the last three months. But over the last three years we've seen a quite serious decline. Regrettably, the share price slid 63% in that period. So it is really good to see an improvement. Perhaps the company has turned over a new leaf.

With that in mind, it's worth seeing if the company's underlying fundamentals have been the driver of long term performance, or if there are some discrepancies.

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While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

Samsung SDI saw its share price decline over the three years in which its EPS also dropped, falling to a loss. Due to the loss, it's not easy to use EPS as a reliable guide to the business. But it's safe to say we'd generally expect the share price to be lower as a result!

The company's earnings per share (over time) is depicted in the image below (click to see the exact numbers).

This free interactive report on Samsung SDI's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

A Different Perspective

Samsung SDI shareholders are down 44% for the year, but the market itself is up 32%. 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. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 9% over the last half decade. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. 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. For example, we've discovered 1 warning sign for Samsung SDI that you should be aware of before investing here.

Of course Samsung SDI may not be the best stock to buy. So you may wish to see this free collection of growth stocks.

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