For many investors, the main point of stock picking is to generate higher returns than the overall market. But in any portfolio, there are likely to be some stocks that fall short of that benchmark. Unfortunately, that's been the case for longer term Aumann AG (ETR:AAG) shareholders, since the share price is down 40% in the last three years, falling well short of the market decline of around 12%. And more recent buyers are having a tough time too, with a drop of 26% in the last year. Furthermore, it's down 30% in about a quarter. That's not much fun for holders.

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.

Check out our latest analysis for Aumann

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' 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).

Aumann became profitable within the last five years. We would usually expect to see the share price rise as a result. So given the share price is down it's worth checking some other metrics too.

We note that, in three years, revenue has actually grown at a 25% annual rate, so that doesn't seem to be a reason to sell shares. It's probably worth investigating Aumann further; while we may be missing something on this analysis, there might also be an opportunity.

The image below shows how earnings and revenue have tracked over time (if you click on the image you can see greater detail).

It is of course excellent to see how Aumann has grown profits over the years, but the future is more important for shareholders. You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

A Different Perspective

While the broader market gained around 20% in the last year, Aumann shareholders lost 25% (even including dividends). 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 4% 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. 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. Take risks, for example - Aumann has 1 warning sign we think you should be aware of.