Why is Associated British Foods stock tumbling today?

Associated British Foods (ABF) shares plunged 8.2% to 1854p following a disappointing Q4 trading update released on Thursday. The company's Primark segment is expected to see a 3% decline in like-for-like sales in the quarter ending September 12, mainly due to a significant 4.3% drop in Europe. This performance fell short of investor expectations, especially after a tough first half of the year.

ABF's management also issued a cautious outlook for FY2027, predicting a wider Sugar adjusted operating loss of £70 million to £170 million, primarily due to higher gas costs and adverse weather conditions in Africa. Analysts were swift to react negatively, with Jefferies calling out the underwhelming Primark Europe sales and describing the guidance as a "downbeat outlook."

The broader market also contributed to the pressure, with the FTSE 100 dropping to a seven-week low as U.S.-Iran tensions escalated and Brent crude breached $100 per barrel. ABF's stock is now trading well below its 52-week high of 2351p and near the lower end of its annual range. Despite the launch of Primark home delivery and the timeline for the demerger being on track, these factors were not enough to counteract the disappointment surrounding the near-term trading data.