> For the complete documentation index, see [llms.txt](https://docs.kaiko.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kaiko.com/rest-api/general/getting-started/api-output/market-open-and-close.md).

# Market open and close

Digital asset exchanges operate approximately 24x7x365. For daily aggregated data, the opening price is calculated as the first trade at or after 00:00:00 UTC. The closing price is calculated as the last trade prior to 00:00:00 UTC.


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