Coastal gray infrastructure – roads, bridges, buildings, ports, and everything else we build along coastlines – is clearly critical for keeping our society functioning, and we invest significantly in it. Coastal green infrastructure, such as wetlands and reefs, is critical to us too as it provides many services and benefits including coastal defense. But just how much money do we ‘allocate’ to gray and green infrastructure? Just like any good investor, we should occasionally assess our portfolio and think about our allocations.