While it may not be enough for some shareholders, we think it is good to see the Sino Geophysical Co., Ltd (SZSE:300191) share price up 17% in a single quarter. But that cannot eclipse the less-than-impressive returns over the last three years. In fact, the share price is down 27% in the last three years, falling well short of the market return.

If the past week is anything to go by, investor sentiment for Sino Geophysical isn't positive, so let's see if there's a mismatch between fundamentals and the share price.

To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. 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.

Sino Geophysical 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. However, we can say we'd expect to see a falling share price in this scenario.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

Dive deeper into Sino Geophysical's key metrics by checking this interactive graph of Sino Geophysical's earnings, revenue and cash flow.

A Different Perspective

We regret to report that Sino Geophysical shareholders are down 23% for the year. Unfortunately, that's worse than the broader market decline of 10%. Having said that, it's inevitable that some stocks will be oversold in a falling market. The key is to keep your eyes on the fundamental developments. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 4% per year over five years. Generally speaking long term share price weakness can be a bad sign, though contrarian investors might want to research the stock in hope of a turnaround. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Consider for instance, the ever-present spectre of investment risk. We've identified 2 warning signs with Sino Geophysical , and understanding them should be part of your investment process.

If you are like me, then you will not want to miss this free list of undervalued small caps that insiders are buying.

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