Estimates vary on the amount of money lost from yesterday's JSE shutdown, but there's consensus that many opportunities were lost as traders were unable to participate in what could have been one of the best days on the bourse in recent times.
Despite the JSE being shut down from 10h24 until 17h20, it still posted gains of just over 3%.
Yesterday's JSe shutdown was not related to the network glitch that stopped trade for almost a full day two months ago.
The earlier incident is believed to have been the result of human error in Johannesburg, while yesterday's failure is being laid at the door of the London Stock Exchange (LSE).
Because the JSE uses the LSE's trading platform, TradElect, the UK computer outage had disastrous effects here as well, with no trade available on local equities, single-stock futures and associated instruments.