This example renders a dual-axis time series chart of S&P 500 stock prices and long-term interest rates from monthly data in a CSV file. The SVG visualization uses D3 v5 scales and axes, with two line generators for each metric and a filled area between them, though the area is nearly transparent. The chart displays the data over time with inverted y-axes and employs `d3.csv` for data loading and `scaleTime` for temporal mapping.