Why is CTT Correios de Portugal stock plunging today?

CTT Correios de Portugal stock is plunging 8.6% to trade at €4.87 after the company disclosed that its board has formally decided to initiate a process to sell a controlling stake in Banco CTT, its wholly owned banking arm, marking a dramatic pivot away from the integrated postal-banking model the group has pursued for years.

The announcement, released after the previous session’s close, caught markets off guard and sent shares gapping lower at the open to a day-low of €4.62 — the weakest level in the stock’s 52-week range.

The sell-off is being deepened by a second, equally damaging disclosure: CTT’s nine-month 2026 results revealed a roughly 40% collapse in profits compared with the prior-year period, driven in part by the impact of new tariffs on parcels shipped from outside the European Union, a key growth driver for the company’s e-commerce logistics segment.

Management simultaneously cut its full-year 2026 financial guidance, removing a key pillar of investor confidence and prompting a reassessment of the stock’s near-term earnings trajectory. The company stated it will seek solutions that preserve its role as a long-term partner of Banco CTT even after ceding majority control, but the market has so far treated the divestiture as a net negative for the group’s earnings mix and strategic coherence.

On the broader market front, U.S. equities were modestly positive on the day, with the S&P 500 adding 0.3% and the Dow Jones gaining 0.7%, offering no macro cover for CTT’s sharp decline and underscoring that today’s move is entirely company-driven. No significant European Central Bank announcements or Portuguese macro data releases appear to have influenced the session.

The combination of a surprise strategic U-turn on Banco CTT and a severe earnings miss with a guidance cut has created a rare double-catalyst sell-off, pushing CTT shares well below their previous close of €5.33 and to within touching distance of their 52-week low of €4.62, as investors reprice both the near-term earnings outlook and the long-term strategic value of the business.