Alpaca incident
Issue in Portfolio History service for requests covering periods prior to June 1, 2026.
Alpaca experienced a minor incident on July 21, 2026 affecting Portfolio History Endpoint, lasting 4h 53m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 21, 2026, 02:49 PM UTC
We have identified an issue affecting the Portfolio History service for requests covering periods prior to June 1, 2026. Our team has identified the underlying cause and is actively working to rectify the issue. We will continue to provide updates as progress is made.
- investigating Jul 21, 2026, 02:49 PM UTC
We are continuing to investigate this issue.
- identified Jul 21, 2026, 03:26 PM UTC
Our team is working to make the data previous to June 1, 2026 available through Portfolio History. Thank you for your continued patience as we monitor progress. We expect this to be complete by 4pm ET.
- identified Jul 21, 2026, 05:55 PM UTC
Our team is working to make the data previous to June 1, 2026 available through Portfolio History. Thank you for your continued patience as we monitor progress. We expect this to be complete by 4pm ET.
- monitoring Jul 21, 2026, 07:42 PM UTC
We have fixed the issue.
- resolved Jul 21, 2026, 08:54 PM UTC
This incident has been resolved.
- postmortem Jul 21, 2026, 09:13 PM UTC
On July 21, 2026, between approximately 4:33 AM and 3:18 PM ET, Portfolio History requests covering periods before June 1, 2026 may have returned inaccurate or unavailable data while historical records were being restored. Our engineering teams completed the historical data restoration and validated access to the affected information. Portfolio History is operating normally.