As an investor, mistakes are inevitable. But really big losses can really drag down an overall portfolio. So take a moment to sympathize with the long term shareholders of Rieter Holding AG (VTX:RIEN), who have seen the share price tank a massive 97% over a three year period. That would be a disturbing experience. And the ride hasn’t got any smoother in recent times over the last year, with the price 96% lower in that time. The falls have accelerated recently, with the share price down 95% in the last three months. While a drop like that is definitely a body blow, money isn’t as important as health and happiness.

Now let’s have a look at the company’s fundamentals, and see if the long term shareholder return has matched the performance of the underlying business.

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There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. 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).

Rieter Holding saw its share price decline over the three years in which its EPS also dropped, falling to a loss. Since the company has fallen to a loss making position, it’s hard to compare the change in EPS with the share price change. However, we can say we’d expect to see a falling share price in this scenario.

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

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. The TSR incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. We note that for Rieter Holding the TSR over the last 3 years was -71%, which is better than the share price return mentioned above. And there’s no prize for guessing that the dividend payments largely explain the divergence!

Rieter Holding shareholders are down 68% for the year (even including dividends), but the market itself is up 12%. 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 11% 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. 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 risks, for instance. Every company has them, and we’ve spotted 4 warning signs for Rieter Holding you should know about.