StockOne 📈🇦🇷
Every financial value in Argentina, in one place.
Dollars (blue · MEP · CCL · oficial), country risk, stocks, bonds, CEDEARs, letras and US indices — live, searchable, and free.
🔗 stockone-nu.vercel.app
🧪 The experiment
This whole app was built in a single sitting — during a World Cup match (England vs Norway on the clock), as a challenge: ship a real, production web app before the final whistle.
Two reasons: to keep the pre-match nerves down before Argentina played, and to sharpen my AI skills by actually building with AI, using Claude Code.
The workflow was fully iterative: ship → look at it → spot something wrong → fix → ship again, minutes per loop. The MVP went live first, and every feature after that was its own small iteration.
✨ Features
- Live dashboard — dollar rates (blue, MEP, CCL, oficial), country risk & inflation, and US indices (Nasdaq, S&P 500, Dow…) with sparklines.
- Global search — find any stock, CEDEAR, bond, letra or index by symbol or name.
- Currency converter — USD ⇄ ARS across every dollar type, with live formatting.
- Top movers — biggest gainers and losers of the day.
- Detail pages (
/i/[category]/[symbol]) — historical price chart with range selector (1M/6M/1Y/5Y), key stats, latest news in Spanish (last 30 days), and an auto-generated company profile from Wikipedia.
- Sortable, paginated tables (25 per page) per category.
- SEO — dynamic Open Graph / Twitter images, sitemap, robots, JSON-LD.
🗂️ Data sources (all free & public)
| What | Source |
|---|
| Dollar rates | dolarapi.com |
| Country risk & inflation | argentinadatos.com |
| Stocks / CEDEARs / bonds / letras | data912.com |
| Historical prices & US indices | Yahoo Finance |
| News | Google News RSS |
| Company profiles | Wikipedia (ES) |
No API keys, no database — just live data with smart ISR caching.
🧱 Tech stack
- Next.js (App Router) + TypeScript
- Tailwind CSS v4
- Vercel — hosting + Web Analytics
- SVG charts hand-rolled (no chart library)
🏗️ How it works
lib/sources.ts — typed fetchers for each source, normalized to a common Instrument model. Everything runs through Promise.allSettled, so one failing source never breaks the page.- Server Components fetch on the server with
revalidate (ISR) caching (60s for market data, longer for news/profiles) to stay fast and avoid hammering the APIs.
app/api/market and app/api/history expose cached JSON for client-side refresh and the chart range selector.- Detail pages are server-rendered per instrument and individually indexable.
🚀 Run it locally
npm install
npm run dev
# http://localhost:3000
Build:
npm run build && npm start
☁️ Deploy
Deployed on Vercel. Any push (or vercel --prod) ships it.
⚠️ Disclaimer
For informational purposes only. Data may be delayed or inaccurate and is not investment advice.
👤 Author
Built by Gastón Mira with Claude Code.
