Why Share Prices Tank

When a share price suddenly goes into freefall, investors scramble to get out of their holdings. But the question that’s top-of-mind is always the same: Why did it happen? Factors range from a company’s underlying fundamental indicators, to over-arching market sentiment. How can investors spot a bad stock before it’s too late?

- Jaco Visser​​​​​

Seeing the price of a prized share drop by between 80% and 90% over the commonly advised medium term will lead to the inevitable question: Why didn’t I see it coming? Various South African “solid stocks” went through such drops over the past couple of years – leaving heavily invested retirement funds and retail investors alike in a world of pain. Not to mention those listed companies that succumbed to corporate governance issues (PR-talk for unethical behaviour and sometimes outright fraud). The latter is far harder to spot.

How do you avoid the future losers?

“At its most basic level share prices tank when there is a significant difference between expectations and reality,” says Jean Pierre Verster, founder and CEO of Protea Capital Management. “Especially when investors realise their expectations are not aligned with reality. Therefore, their expectations need to adjust. When their expectations suddenly need to adjust downward because they realise that reality is not as optimistic as they thought, it leads to a share price that tanks.”

Expectations were realigned in various local companies over the past couple of years. Fertilisermaker Omnia’s share price dropped by more than 85% over the past five years through 30 July. Aspen Pharmacare slumped by 69% over the same period. Information technology company EOH, with sales of over R16bn in its last fiscal year, plummeted more than 80% over the past five years – with almost half of the decline since the beginning of this year.

Sugar and starch producer Tongaat Hulett fell 91% over the past five years and had trade in its shares suspended on 10 June.