Picture the U.S. financial system. You may see money — green, maybe a little faded and wrinkled, but vital nonetheless. Or maybe the image that comes to mind is plastic — shiny, fancy and colorful on one side, boring fine print on the other. Maybe it looks like a smartphone app. All of these connect us to the system and the services it provides, but they aren’t quite the system itself. Now, there’s a new way to envision the financial system — and how it has been manifested in the built environment — and it’s a tool that will be useful to advocates fighting for community investment in U.S. cities.