The 9 most important cities in the world for the rich

Every year luxury estate agent Knight Frank and Wealth-X, the research firm that concentrates on high net worth individuals, release a comprehensive report about what makes the richest people in the world tick.

The study is "based on the views of around 400 of the world's leading private bankers and wealth advisors who, between them, manage assets for about 45,000 ultra high net worth individuals (UHNWIs) with a combined wealth of over half a trillion US dollars," the groups state.

So in other words, it's a pretty good gauge of what the richest people in the world are doing with their cash, where they are moving, what they worry about, and of course what they are looking to do in the future.

In the report, Knight Frank and Wealth-X presented a short, snappy league table of the most important cities for the world's high net worth individuals. Interestingly, one of Switzerland's main financial hubs - Zurich - dropped off the list this year.

Here are the top nine cities that did make it.