A deepfake photograph and accompanying report of an explosion near to the Pentagon outside Washington DC led to a 0.26 percent fall in the US stock market in four minutes. 

A verified Twitter account called @BloombergFeed impersonating a Bloomberg profile had shared a photo of plumes of smoke billowing over a large white building with the words 'Large explosion near The Pentagon Complex in Washington D.C - Initial Report'.

As noted by the Insider, the photograph featured 'some of the hallmarks of AI-generated images'. The columns on the supposed building in the hoax photo varied in size and the fence appeared to blend into the sidewalk in some places. 

The photograph and report, which were later deleted, had quickly gone viral on Twitter and were retweeted by high-profile Twitter Russian news account @RT and @DeItaone.

The report was rebutted as false by US authorities.

News, commentary, analysis 🗞️

• https://www.insider.com/ai-generated-hoax-explosion-pentagon-viral-markets-dipped-2023-5?s=03

• https://www.npr.org/2023/05/22/1177590231/fake-viral-images-of-an-explosion-at-the-pentagon-were-probably-created-by-ai

• https://www.afr.com/technology/deepfakes-spell-deep-trouble-for-markets-20230523-p5daih

• https://mashable.com/article/ai-deepfake-image-pentagon-explosion-hoax

• https://nypost.com/2023/05/22/ai-generated-photo-of-fake-pentagon-explosion-sparks-brief-stock-selloff/

• https://petapixel.com/2023/05/22/ai-generated-image-of-pentagon-explosion-caused-markets-to-dip/

• https://edition.cnn.com/2023/05/22/tech/twitter-fake-image-pentagon-explosion/index.html

• https://techxplore.com/news/2023-05-fake-image-pentagon-explosion-briefly.html