This interactive banking dashboard visualizes daily closing prices for multiple bank stocks over time, with a dropdown menu that filters the chart to show a single stock or all groups. The visualization uses React with D3 v4, rendering an SVG line chart with a time-scaled X-axis, linear Y-axis, and a categorical color scale from `d3-scale-chromatic`. Data is loaded from a CSV file, grouped with `d3.nest()`, and each stock’s price trend is drawn as a separate colored line. The interface includes a styled header and descriptive text about banking sector risks.