The Stockholm Stock Exchange surged on Wednesday, mirroring strong gains across major European markets. Wall Street also opened the trading session with a robust advance.

The market rally followed news that the U.S. and Iran have agreed to a two-week ceasefire. The announcement came just 90 minutes before the original deadline for a large-scale strike against Iran was set to expire. This triggered a sharp decline in oil and gas prices while global equity markets soared.

At the close, the OMXS30 index was up 4.25 percent at 3,094.16. Shares worth approximately SEK 31.3 billion changed hands on the Stockholm bourse.

Among the major industrial sectors, engineering posted the strongest performance with a 5.3 percent gain. At the other end of the spectrum, energy trailed the market, sliding 9.4 percent.

Among the blue-chip stocks in the OMXS30 index, Volvo B rose 7.7 percent, while Epiroc A climbed 7.0 percent. Evolution saw the weakest performance, falling 1.0 percent, while Tele2 B edged up 0.1 percent.

Telecom equipment provider Ericsson rose 1.8 percent. Major shareholder Cevian Capital has sold 45 million shares in Ericsson, reducing its stake from 4.6 to 3.2 percent, according to EFN, citing an update from the ownership tracking service Holdings. The change is also reflected in Ericsson's annual report. The transaction was carried out during 2025 and is valued at between SEK 3.1 and 4.4 billion.

Mining company Lundin Mining has completed the acquisition of an additional 5 percent in SCM Minera Lumina, which owns the Caserones copper mine in Chile, as well as a 30.9 percent stake in the Los Helados project and an associated 0.62 percent smelter royalty. The stock rose 9.0 percent, while industry peer Boliden increased 5.5 percent.

Oil stocks were among the losers following the collapse in crude prices. IPC sank 11.3 percent, while Meren Energy dropped 7.9 percent. Brent crude is currently trading around 95 dollars per barrel.

An external legal review of the consumer electronics chain Elon found no evidence to support suspicions of criminal activity within the business. However, the investigation highlighted recurring deficiencies in the documentation of decisions and noted that certain executives had, on occasion, failed to comply with the company's code of conduct. The review was initiated following media reports in the autumn of 2025, and the company intends to publish the report in its entirety. Elon's shares rose 1.1 percent.

IT consultancy Knowit has been approved as a supplier under the NATO agency NCIA's BOA framework agreement via its Finnish subsidiary Knowit Solutions. The approval enables participation in tenders for digital and secure systems for NATO and its member states. Knowit already holds similar approvals in Sweden. The stock climbed 2.3 percent.

Auto parts retailer and workshop operator Meko is implementing changes to its Norwegian operations. Geir Hoff will take on expanded responsibility for Meko's entire Norwegian business when Morten Birkeland retires and leaves the group management this summer. Hoff currently oversees Mekonomen and Meca in Norway and will now also be responsible for Sørensen og Balchen. The stock increased 2.2 percent.

Nordea downgraded its recommendation for telecom operator Tele2 to Hold from Buy, citing the stock's strong recent performance.

ABG Sundal Collier lowered its ratings for four real estate companies. Fabege, Wallenstam, and Platzer were all downgraded to Sell, while Balder was cut to Hold. Despite the downgrades, real estate stocks had a positive day, with all four shares ending higher.