What systems are in place that determines why, for example, that it takes 7.8 Hong Kong dollars to buy 1 U.S dollar? This is the sixth lecture in the "International Finance" series in which I discuss "international monetary systems". We find out that different systems for determining exchange rates include a varying degree of market and Government forces. We also find out that there are advantages and disadvantages to these different systems. For example, some countries with a history of corruption, when they have the ability to print their own money, may have to give up this power to convince the rest of the world to take the risk and once again invest in their country. In my opinion, this is probably the most interesting lecture in the "International Finance" series. To me, it is fascinating to discuss and analyze where economic and political forces conflict and how sometimes the market (or the people) can be the ultimate disciplining factor. Having said this, as always, the goal is not to try to get you to take a particular side, but rather for you to understand (logically, not emotionally) different sides of an issue, and then you make up your own mind.