The ultra-exclusive trophy home is ever more conspicuous in the marketplace, and with it comes the proliferation of the $100 million-plus listing. Over the past decade, a record 32 properties have sold at the nine-figure mark across a dozen international property markets. This year, to date, there have been five estates listed for nine figures, including two priced at more than a quarter billion dollars. But even these ultimate luxury properties follow the fundamental market forces in play. Let’s take a look at the factors contributing to the rise of the nine-figure trophy home.