This example visualizes monthly stock prices for multiple companies using an interactive streamgraph-like layout built with D3 v3. It renders small multiples of grouped bars for each stock symbol, with a color scale distinguishing the groups. A form-driven toggle animates between two views: in the "multiples" view, each stock’s bars are aligned to its own baseline; in the "stacked" view, the bars are stacked cumulatively by value offset. The transition loops automatically every few seconds, smoothly interpolating bar positions and labels via SVG transitions.