How do you build a live stock index with no backend?

Run a Python builder on a schedule (GitHub Actions), have it fetch prices with yfinance and write a single JSON file, then commit that file back to the repo. GitHub serves it over its CDN as a free static API, and your Webflow front end fetches the JSON on page load and renders it with Chart.js. The only moving part is a cron that commits a file — no server, no database.