What happened at UBS on Tuesday? As we reported on Wednesday, the bank was said to have experienced a "brief" technology outage that impacted "some" of its trading business. The incident was resolved within the day. 💥Follow us on WhatsApp for news alerts. 💥 All is now back to normal, but the outage came at a challenging time amidst the volatility imposed by war in the Middle East and there are suggestions that it was not all that brief. Multiple sources at the Swiss bank say it lasted for up to three hours and affected trading on different desks, including FX and futures. As such, it's thought that the failure was caused by infrastructure rather than a specific trading application. "If it's transversal and cross-business, it's due to infrastructure," observed one insider. It's thought that UBS employees were unable to login to internal messaging systems like Teams as a result of the outage. One insider suggested it was due to Citrix, which provides software that UBS uses to validate people logging into its systems. "We had no access," he says. "Even Neo [UBS's cross asset trading platform] was down." The problem may have been a security certificate that was noted updated or corrupted. UBS's outage came as the bank rang ritual cowbells to celebrate the integration of most of Credit Suisse's computer systems. In December it parted company with Mike Dargan , its former CTO. Thousands of technology jobs are expected to go at the bank this year now that work on the integration is done. One senior insider said the outage had nothing to do with the integration or the coming job cuts. However, they also observed that UBS has not has these kind of non-brief outages much before. Hopefully it will not have them much again. Have a confidential story, tip, or comment you’d like to share? Contact: +44 7537 182250 (SMS, Whatsapp or voicemail). Telegram: @SarahButcher. Signal: sarahbutcher.22 Click here to fill in our anonymous form , or email editortips@efinancialcareers.com. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate.