It hasn't been the best quarter for Ocean Bio-Chem, Inc. (NASDAQ:OBCI) shareholders, since the share price has fallen 12% in that time. But that doesn't change the fact that shareholders have received really good returns over the last five years. In fact, the share price is 275% higher today. Generally speaking the long term returns will give you a better idea of business quality than short periods can. Ultimately business performance will determine whether the stock price continues the positive long term trend. While the long term returns are impressive, we do have some sympathy for those who bought more recently, given the 40% drop, in the last year.

Although Ocean Bio-Chem has shed US$11m from its market cap this week, let's take a look at its longer term fundamental trends and see if they've driven returns.

See our latest analysis for Ocean Bio-Chem

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

Over half a decade, Ocean Bio-Chem managed to grow its earnings per share at 82% a year. This EPS growth is higher than the 30% average annual increase in the share price. So one could conclude that the broader market has become more cautious towards the stock. This cautious sentiment is reflected in its (fairly low) P/E ratio of 9.54.

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

It's probably worth noting that the CEO is paid less than the median at similar sized companies. But while CEO remuneration is always worth checking, the really important question is whether the company can grow earnings going forward. This free interactive report on Ocean Bio-Chem's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). 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 Ocean Bio-Chem the TSR over the last 5 years was 300%, which is better than the share price return mentioned above. The dividends paid by the company have thusly boosted the total shareholder return.