This gallery example presents an interactive stacked bar chart that visualizes financial data over time from 2021 to 2044, with bars divided into six categories such as spent income, spent return, and retained capital. The chart uses negative and positive value ranges to show spending versus retained amounts, with mouseover highlighting to emphasize individual bars. Built with D3 v4, the visualization employs `d3.stack()` for data stacking, `d3.scaleBand()` and `d3.scaleLinear()` for axes, and SVG rendering with CSS-based highlighting triggered by mouse events. The data originates from a custom `FinancialPlan` class containing hardcoded arrays.