Space Markets Daily

How the index is built

• Members: every public company in our space stock roster except defense primes and diversified aerospace groups (Boeing, Lockheed Martin, Honeywell, Airbus, Safran and the like), whose shares mostly track aircraft, defense and industrial demand. Satellite operators count.
• The number: the equal-weighted mean of each member's % move in its latest session, so one mega-cap can't be the whole story. Foreign listings count by their % move in local currency; a percentage has no currency, so no exchange-rate guess is involved. Each listing counts once.
• When it updates: once each US trading day. Our sync stores every member's session move at 21:30 UTC, after the 4 pm New York close, and the page names the session it describes. The index does not move during the session; between closes it shows the last close. For intraday prices, see space stocks.
• Freshness: a move counts only if it was quoted in the last four days. A company that stops trading drops out rather than repeating its last move. Members whose price did not change count as neither advancing nor declining.
• Not covered: listings our quote source (Yahoo Finance) does not carry, currently the Abu Dhabi Securities Exchange (Space42).
• Method change, 24 Sep 2026: foreign listings (Paris, Frankfurt, Milan, Stockholm, Warsaw, Toronto, Tokyo, Seoul) joined the index; diversified aerospace groups moved out; companies that were taken private or delisted were removed. The index grew from 24 members as a result, so readings before and after this date are not like-for-like.

For information only, not investment advice. SpaceNexus is not a registered investment adviser, broker or dealer, and nothing here is a recommendation to buy, sell or hold any security. Data may be delayed, estimated or incomplete; check the source before acting. Full disclaimer