Stock News Calendar

A single-user notebook for Dao. It lays market news on a calendar, lists the same items on a timeline, plots the prices and percent moves that were actually written down, and draws the links between stories.

There is no login. The app reads one file, data/news.json, at build time. Updating the news means committing a new version of that file.

Run

npm install
npm run dev

Open http://localhost:3000. npm run build produces a production build that Vercel can deploy with no extra configuration and no environment variables.

Views

• Calendar opens on October 2026. Move to earlier or later months with Prev and Next. Items with a day-level date sit on that day, color-coded by industry. Month, quarter, and uncertain dates stay in the “This month / undated” strip instead of being pinned to a guessed day. A crowded day keeps a few headlines in the cell and lists the rest in the agenda. Click an item for the summary, key number, stated price, stated move, and related items.
• List is the same filtered set as a timeline.
• Ticker picks one symbol and shows its items in order. A price line is drawn only from price_mentioned rows whose ticker is the one you picked. Percent moves are markers from move_pct. Filled markers are items that name only that ticker. Open markers name several tickers, so the percent may describe the group or the tape rather than that symbol alone. Linked items from related_ids can be shown on the same timeline, including reactions that land on a later date.
• Connections is a graph of related_ids. Drag to pan, drag a node to move it, and click a node for the write-up. Two reading paths are laid out from links already in the file: Meta capex → Nvidia → CoreWeave debt → rates, and Iran / oil → airlines and defense.
• Upcoming, in the side column, is the next 14 days of items whose status is upcoming. It follows the filters.

Filters (industry, ticker or company or headline, event type, status, stated price range, and move direction plus a minimum size) apply to every view. Prices and moves are never filled in when the file leaves them null.

Light and dark follow the system preference until you toggle them. The choice is stored in this browser.

News file

data/news.json is a JSON array. One object per item:

Field	Meaning
id	Stable slug, usually YYYY-MM-DD-short-name. Other items point at this.
date	YYYY-MM-DD. When the news happened or the event is scheduled. For a month or quarter, use a day inside that period (the first day is fine).
date_precision	day, month, quarter, or unknown. Only day is pinned to a calendar cell.
status	happened, upcoming, or developing.
title	Short headline.
summary	One or two plain sentences.
tickers	Symbols, or [].
companies	Names, or [].
industry	Free text. Known industries get a stable color; a new one still gets a color.
event_type	earnings, fda, trial, fed, macro_data, policy, deal, ipo, lockup, analyst, market_move, geopolitics, or other.
key_number	The figure worth remembering, or "".
price_mentioned	{ "ticker": "ORCL", "price": 136 } or null. Do not invent a price.
move_pct	Signed percent, such as -4.4, or null. Do not invent a move.
source_digest_date	YYYY-MM-DD the note was written down.
related_ids	Ids of connected items. Use [] when nothing connects.
connection_notes	Why the links exist, or .

Only record what was actually in the source notes. Leave price and move null when a number was not stated.

Add an item

1. Open data/news.json.
2. Copy an existing object and give it a new id.
3. Fill the fields above. Point related_ids at ids that already exist, and add the new id onto those items when the link should be visible from both sides (the graph treats a link in either direction as one edge).
4. Check that the file is still valid JSON.
5. Commit the file. A connected Vercel project will rebuild from that commit.

{
  "id": "2026-10-24-example",
  "date": "2026-10-24",
  "date_precision": "day",
  "status": "happened",
  "title": "Short headline",
  "summary": "One or two sentences with only figures that were stated.",
  "tickers": ["NVDA"],
  "companies": ["Nvidia"],
  "industry": "Semiconductors",
  "event_type": "market_move",
  "key_number": "",
  "price_mentioned": null,
  "move_pct": null,
  "source_digest_date": "2026-10-24",
  "related_ids": [],
  "connection_notes": ""
}