This example visualizes SPAC investment data as an interactive scatter plot, showing the relationship between current price and annualized return for various companies. Each point is colored by sector and sized by market cap, with a color legend on the right. Hovering over a legend item highlights the corresponding sector’s points while fading others, using React state and `onMouseEnter` handlers. The chart is rendered with SVG via D3 scales (`scaleLinear`, `scaleOrdinal`, `scaleSqrt`) and React components, reading CSV data through `d3.csv`.