So the stock market rise was probably some kind of bubble phenomenon, and if it burst it might very well be enough to bring everything down again. Or perhaps not; economics was a bizarre field, and there were senses in which the whole stock market was simply too unreal to have impacts beyond itself. But who knew till it happened? Sax, wandering the streets of Burroughs looking at the stock market displays in the office windows, certainly didn’t claim to. People were not rational systems.