$21 Billion Hardware Rectification?

ASX Tickers Herald Sun: Futures trading halt 'lead to big stock fall'. From the report, "ASX halted futures trading about 12:45pm to address an urgent 'hardware rectification', and that lasted until about 2pm. In the meantime it left traders with no where to hedge risk, so they took to selling physical stocks instead." If it is really the case, it would one heck of an expensive hardware rectification, as $21 billion were wiped off the All Ordinaries today (red everywhere on our real-time screens).