This pie chart visualizes the distribution of credit ratings, with the largest segment representing 73.21% for "AAA Local" ratings. The chart is rendered as an SVG using D3 v5, with `d3.pie` and `d3.arc` generating the segments and `d3.scaleOrdinal` assigning colors from a custom palette. A legend accompanying the chart displays each rating label and its corresponding percentage value, formatted with `d3.format`. Data is loaded asynchronously from a JSON file and parsed into numeric values before rendering.