Get our breaking news email , free app or daily news podcast The world is holding its breath as it waits to find out whether this years estimated $US1tn investment in artificial intelligence is resting on a castle made of sand. Last week, the Nasdaq 100 – an index of the 100 biggest non financial stocks on the American tech heavy Nasdaq exchange – dropped by 5.5%, triggering the usual angst that the AI boom is about to go bust. The recent rot may have started with the failure of Firmus, an...