Every investor on earth makes bad calls sometimes. But you want to avoid the really big losses like the plague. So spare a thought for the long term shareholders of PharmaBlock Sciences (Nanjing), Inc. (SZSE:300725); the share price is down a whopping 81% in the last three years. That might cause some serious doubts about the merits of the initial decision to buy the stock, to put it mildly. And more recent buyers are having a tough time too, with a drop of 44% in the last year. Unfortunately the share price momentum is still quite negative, with prices down 17% in thirty days. We really hope anyone holding through that price crash has a diversified portfolio. Even when you lose money, you don't have to lose the lesson.

Since PharmaBlock Sciences (Nanjing) has shed CN¥445m from its value in the past 7 days, let's see if the longer term decline has been driven by the business' economics.

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 flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

PharmaBlock Sciences (Nanjing) saw its EPS decline at a compound rate of 7.5% per year, over the last three years. The share price decline of 43% is actually steeper than the EPS slippage. So it's likely that the EPS decline has disappointed the market, leaving investors hesitant to buy.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

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

A Different Perspective

We regret to report that PharmaBlock Sciences (Nanjing) shareholders are down 44% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 12%. 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 7% per year over five years. 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. 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. Consider risks, for instance. Every company has them, and we've spotted 2 warning signs for PharmaBlock Sciences (Nanjing) you should know about.

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.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.
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.