# AI incidents at Citigroup

Source: https://www.bankingnewsai.com/banks/citigroup/ai-incidents
Last updated: Oct 21, 2026

## Has Citigroup had a publicly reported AI incident?

Yes: 1 publicly reported AI incident on record since January 2022.

| Date | Institution | Incident | AI? | Role | Category | Severity | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| May 2, 2022 | Citigroup (Citigroup Global Markets Limited) | [Citi trading algorithm sells $1.4bn of European stocks after an input error; UK and German fines](https://www.bankingnewsai.com/ai-incidents/citigroup-2022-flash-crash-trading-algorithm) | Automation, not AI | Institution's own AI | Trading automation | 4/5 | Regulator finding |

### Citi trading algorithm sells $1.4bn of European stocks after an input error; UK and German fines

On 2 May 2022 a Citigroup Global Markets Limited (CGML) trader in London meant to sell a US$58m equity basket but entered a US$444bn one. Per the FCA, controls blocked US$255bn, but the remaining US$189bn went to an automated VWAP trading algorithm that sold US$1.4bn of shares across European exchanges before the order was cancelled, coinciding with a brief fall in several indices and a US$48m loss for CGML. In May 2024 the FCA (£27.8m) and PRA (£33.9m) fined CGML a combined £61.6m for missing hard blocks, a click-through alert and slow monitoring; BaFin fined Citi's German unit €12.975m. Citi called it an individual error corrected within minutes. The execution algorithm was not described as AI.

https://www.bankingnewsai.com/ai-incidents/citigroup-2022-flash-crash-trading-algorithm

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