This interactive map shows US state home price performance as a choropleth, colored by seasonally adjusted one-year returns, alongside city markers sized by population. Hovering reveals detailed tooltips for both states and cities. It uses D3.js v7 with `d3.geoAlbersUsa` and `d3.geoPath` to render TopoJSON state boundaries, plus `d3.scaleSequential` for color encoding and `d3.scaleSqrt` for circle sizes. Data comes from two CSV files covering state-level price indices and city-level housing metrics.