Critical incident

Alpaca: 3rd Party Outage affecting Market Data

Affected: wss://stream.data.alpaca.markets/v2/sip, wss://stream.data.alpaca.markets/v2/iex

Current status of Alpaca: Operational — live Alpaca status

Timeline

1. Oct 15, 2026, 17:32 UTC
   investigating
   We are investigating an 3rd party outage affecting market data delivery for IEX and SIP feeds. New bars and trades may not be updating for impacted symbols. We are actively working to restore the feed and will post updates soon.
2. Oct 15, 2026, 17:39 UTC
   identified
   We have identified the cause of the market data delivery issue as a vendor-side network disruption affecting third-party data feeds (IEX and SIP). This is not caused by an issue on our end. We continue to work with the vendor to restore the feed and will post updates as the situation progresses.
3. Oct 15, 2026, 17:57 UTC
   identified
   We are continuing to work on a fix for this issue.
4. Oct 15, 2026, 18:06 UTC
   identified
   We’re continuing to investigate the issue and will share an update as soon as we have more information.
5. Oct 15, 2026, 18:09 UTC
   identified
   As a precaution during this outage, we are temporarily disabling notional and fractional share trading to open new positions to prevent orders from executing at stale prices. Whole-share trading remains available. Liquidation will still be available. We will restore fractional trading once the underlying market data feed issue is resolved.
6. Oct 15, 2026, 18:15 UTC
   monitoring
   Market Data Feeds are receiving quotes and restored. We are continuing to monitor the performance
7. Oct 15, 2026, 18:18 UTC
   monitoring
   We have re-enable notional and fractional share trading
8. Oct 15, 2026, 18:46 UTC
   resolved
   The incident has been resolved. Connectivity to our market data provider has been restored, and market data (IEX and SIP feeds) is updating normally. Fractional and notional share trading have been re-enabled. We apologize for any inconvenience this caused.

Updates as published by Alpaca (original).