We describe a model of a stockmarket in which independent adaptive age
nts can buy and sell stock on a central market. The overall market beh
avior, such as the stock price time series, is an emergent property of
the agents' behavior. This approach to modelling a market is contrast
ed with conventional rational expectations approaches. Our model does
not necessarily converge to an equilibrium, and can show bubbles, cras
hes, and continued high trading volume.