According to New World Wealth's latest study, the United Stated is the wealthiest country in the world, followed by China and Japan. For them, total individual wealth refers to the private wealth held by all the individuals in each country. This includes all their assets (property, cash, equities, business interests) less any liabilities. Though they exclude government funds from their figures.
One thing to note is that Australia only has 22 million people living there, making its 9th place quite impressive. New World Wealth also highlighted that China was the fastest growing W10 country over the past 15 years (in terms of US$ wealth growth).
Besides the richest countries by total assets, the firm also ranked countries by per capita wealth. The wealthiest people in the world are found in Monaco, Liechtenstein and Switzerland.
Only Australia, the United States and the UK showed up in both lists.