I'd like to know what will be the future of trading once people live on different worlds/moons? The problem I am referring to is the natural time lag of information (aka speed of light) between distant points. If you live on Mars it could take about 11 minutes and 7 sec each way to send and receive a trade order/confirmation. (See mathforum.org/library/drmath/view/56304.html) Other celestial bodies could take shorter/longer times. How can the trading market function with this degree of lag time? Any ideas?