Human populated experimental asset markets produce data with two major qualitative consistencies; finite price bubbles and rate of return parity. Robot traders following different behavioural rules are used to create data that is qualitatively similar to that produced by human subjects in a laboratory setting. A trend pricing component of behaviour is required for robots to generate finite price bubbles. A single arbitrageur in combination with trend pricing and simple profit maximization is required to generate rate of return parity. Copyright Springer Science+Business Media, LLC 2007interest rate parity, rate of return parity, arbitrage, C89, F3, G12,