Library/Data Viz/Streamgraph
Evolution · Composition · Smooth baseline

Strategy mix, flowing.

Same data as the stacked area, but centered baseline. Reads as "shapes over time" rather than "totals over time" — easier to see individual category trajectories at the cost of a less legible total. Good for narrative slides, board updates, marketing visuals.

AUM mix by strategy · Q1 2024 — Q1 2026

5 categories · 9 quarters
Peak total
$2.8B
Q1 2026
Fastest growing
Fund Factory
+8.1× in 2Y
Most stable
AIX
flat-ish band
Categories
5
product lines

Fork & ship

D3 v7 d3.stack with stackOffsetWiggle. Drop new data into SERIES.

const SERIES = [
  { name: "Marketplace", values: [340,...] },
  // ... etc
];

When to use this

Composition trends where individual shapes are the story. Skip when totals matter — use stacked area. Avoid when you have <3 categories — a multi-line chart reads cleaner.

Reading notes

Wider band = larger AUM that quarter. Centered baseline removes the "starts-at-zero" anchor, which is why this works for narrative but not for precise totals.