The simplest way to benefit from a rising market is to buy an index fund. Active investors aim to buy stocks that vastly outperform the market - but in the process, they risk under-performance. That downside risk was realized by California Water Service Group (NYSE:CWT) shareholders over the last year, as the share price declined 17%. That contrasts poorly with the market return of 34%. However, the longer term returns haven't been so bad, with the stock down 12% in the last three years. Furthermore, it's down 13% in about a quarter. That's not much fun for holders. This could be related to the recent financial results - you can catch up on the most recent data by reading our company report.

While the last year has been tough for California Water Service Group shareholders, this past week has shown signs of promise. So let's look at the longer term fundamentals and see if they've been the driver of the negative returns.

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).

Unfortunately California Water Service Group reported an EPS drop of 48% for the last year. The share price fall of 17% isn't as bad as the reduction in earnings per share. So the market may not be too worried about the EPS figure, at the moment -- or it may have expected earnings to drop faster. With a P/E ratio of 52.26, it's fair to say the market sees an EPS rebound on the cards.

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

We're pleased to report that the CEO is remunerated more modestly than most CEOs at similarly capitalized companies. It's always worth keeping an eye on CEO pay, but a more important question is whether the company will grow earnings throughout the years. Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here..

A Different Perspective

Investors in California Water Service Group had a tough year, with a total loss of 15% (including dividends), against a market gain of about 34%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 0.9% over the last half decade. 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. For example, we've discovered 4 warning signs for California Water Service Group (2 can't be ignored!) that you should be aware of before investing here.

For those who like to find winning investments this free list of growing companies with recent insider purchasing, could be just the ticket.

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