"My big fear is that it leads to a crisis of confidence, that's more of an issue than the reality of what's happening to the banks," Sasfin equity strategist David Shapiro told Reuters, referring to the falling stocks.
Among fallers, shares in the banking sector slipped 2.78%, reflecting global market sentiment.
This decline comes after Credit Suisse's biggest investor
said it was unable to increase its stake, citing regulatory issues about the size of its holding.
At 1608 GMT, the rand traded at 18.4025 against the dollar, 1.56% weaker than its previous close. Data from Statistics South Africa showed retail sales fell 0.8% year on year in January after falling by a revised 0.5% in December. The country's benchmark 2030 government bond slipped in afternoon deals, with the yield up 3 basis points at 10.045%. (Reporting by Tannur Anders and Alexander Winning; Editing by Rashmi Aich, Anait Miridzhanian)