Sessions
Market 24h Clock: Every Stock Exchange's Session on One Dial
A 24-hour dial with a ring for each of 23 stock exchanges and an arc for each session, live, in any time zone, with a scrubber to see who overlaps with whom at any hour.
The Market 24h Clock is a single dial with 24 at the top, 06 on the right, 12 at the bottom and 18 on the left. Each of twenty-three exchanges is a concentric ring, coloured by region, and each of its sessions is an arc on that ring: the regular session in full colour, pre-market and after-hours in a dimmed shade, lunch breaks in grey. The hand shows the present moment, the arc it sits inside glows, and green and red dots on the inner circle mark every opening and closing bell of the day.
The whole dial can be redrawn in the time of any of sixteen financial centres or in your own zone. Daylight saving is resolved per venue from the IANA database, so when New York changes its clocks before London the arcs shift exactly as the sessions do. A scrubber drags the hand through any hour of any day to see which venues overlap, and a link can be made to a specific instant so that an overlap can be shared.
On a weekend or a holiday a venue has no session; its ring is drawn faint at its usual hours so the dial keeps its shape rather than going blank. Hovering a ring gives the venue's local time, its UTC offset, its session window and its headline index, and a status board beneath the dial lists every venue with its phase and the countdown to its next change.
What it shows
- Twenty-three venues from Wellington to Sao Paulo, plus the CME Globex futures session
- Sixteen financial centres' time zones, or your own, with daylight saving resolved per venue
- Pre-market, regular, lunch and after-hours sessions drawn separately
- A scrubber for any hour of any day, and a link to a frozen instant
- Opening and closing bells marked on the dial; the share of global market cap open right now
Guides that explain it
Market structure
Trading sessions and overlaps
The 24-hour cycle from Wellington to New York, the Asian, European and American sessions in UTC, and why the London–New York overlap carries the volume.
4 min read
Market structure
Pre-market and after-hours
US pre-market and after-hours trading hours, why liquidity is thin and spreads wide, how earnings move stocks after the close, and what the auctions do.
3 min read