The Stockholm Stock Exchange saw a sharp decline on Monday amid concerns over a looming trade conflict between the EU and the United States. The backdrop is US President Donald Trump's threat to impose tariffs on eight European countries, including Sweden, in response to their lack of support for plans to acquire Greenland.

At the close, the OMXS30 index was down 1.79 percent at 2,984.58. Shares worth approximately SEK 26.9 billion were traded on the Stockholm Stock Exchange.

All major industrial sectors on the exchange fell. The technology sector saw the largest drop, declining by 4.1 percent.

Among the leading stocks included in the OMXS30 index, Saab B rose 2.2 percent while Boliden was up 2.0 percent. The worst performer was Nibe B, down 5.1 percent, while Lifco B fell 4.6 percent.

Defense company Saab climbed to new record highs during the day as geopolitical tensions increased further following Donald Trump's latest statements regarding Greenland, where Trump is threatening to impose tariffs on NATO allies.

Mining companies Boliden and Lundin Mining also bucked the trend following higher base metal prices. Boliden increased by 2 percent while Lundin Mining rose 1.8 percent.

Pharmaceutical company Astra Zeneca is acquiring Abelzeta Pharma's 50 percent stake in the development and commercialization rights in China for C-CAR031, a therapy candidate for liver cancer and other solid tumors. The stock fell 0.9 percent.

E-commerce company Cheffelo reported a preliminary operating profit for the fourth quarter of 2025 of SEK 36.8 million, an increase of 25 percent from the previous year. The stock jumped 15.7 percent.

Nanosatellite company Gomspace rose 3 percent. The company presented a market forecast for 2026 and expects continued strong and profitable growth. Revenues are projected to reach SEK 540 to 640 million, corresponding to an increase of just over 30 percent at the midpoint compared to 2025. The EBITDA margin is expected to land between 5 and 12 percent.

Medical technology company Ortoma reported a preliminary full-year 2025 revenue of SEK 67 million and an operating loss of SEK 21 million. The company's goal for 2026 is to reach SEK 80 million in revenue and sell 100 systems. Furthermore, the target is to achieve positive cash flow during the second half of 2027. The stock ended unchanged.

On the analysis front, Nordea raised its recommendation on Volvo to buy from hold. The stock fell 1.9 percent.

SEB upgraded Sagax to buy from hold. The stock was down 1.9 percent.

Furthermore, SEB downgraded its recommendation on Atrium Ljungberg to hold from buy. The stock dropped 2.2 percent.

Dagens Industri recommended buying Bravida. The stock fell 1.2 percent.