Current answer
Alpaca experienced a critical incident: 3rd Party Outage affecting Market Data. ServiceAlert observed recovery on Oct 15, 2026.
Provider-reported start: . Notice published: .
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Incident Lifecycle
Affected Components
wss://stream.data.alpaca.markets/v2/sip
wss://stream.data.alpaca.markets/v2/iex
Incident Timeline
Monitoring
We have re-enable notional and fractional share trading
Oct 15, 2026 at 6:18 PM UTC
Monitoring
Market Data Feeds are receiving quotes and restored. We are continuing to monitor the performance
Oct 15, 2026 at 6:15 PM 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.
Oct 15, 2026 at 6:09 PM UTC
Identified
We’re continuing to investigate the issue and will share an update as soon as we have more information.
Oct 15, 2026 at 6:06 PM UTC
Identified
We are continuing to work on a fix for this issue.
Oct 15, 2026 at 5:57 PM 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.
Oct 15, 2026 at 5:39 PM 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.
Oct 15, 2026 at 5:32 PM UTC
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