The Ibex 35 of the Madrid Stock Exchange has started the session this Monday with a decrease of 0.92%, standing at 18,815 points. The start of the day is again conditioned by international geopolitical tensions, among them the war in Iran and doubts about oil supply, as well as the results of the elections in Brazil and the new round of corporate earnings.
In commodities, the Brent barrel, a reference in Europe, fell by 1.1% at the opening of the markets in the Old Continent, to 115.41 dollars (103 euros), while the West Texas Intermediate (WTI), an indicator in the United States, retreated by 1.7%, to 101.53 dollars (90.6 euros).
All this takes place despite the fact that Houthi forces have carried out several offensives with ballistic missiles and drones against targets in Saudi Arabia, including the King Khalid International Airport in Riyadh, and various crude oil pumping stations.
The military spokesman for the Houthi rebels, Yahya Sari, announced this Monday through a statement that their armed forces have "successfully" attacked the airfield of the Saudi capital using a ballistic missile that, he claimed, achieved an impact "with precision".
Corporate movement in the energy sector
In the Spanish business sphere, before the bell rang, it was known that Moeve and the Portuguese Galp have decided to conclude their discussions to create an 'energy giant' in the Iberian Peninsula through the integration of their traditional refining and distribution and sales businesses at service stations ('downstream'). Thus, the door is closed to finalize the non-binding agreement reached in January to analyze this operation.
On the other hand, the National Commission of Markets and Competition (CNMC) has authorized in the first phase the purchase by Iberdrola of the electricity marketing business of Contigo Energía in Spain, an operation with which the electric company will incorporate a portfolio of 100,000 customers.
In addition, the supermarket chain Dia has announced that it obtained gross sales under its brand of 4.562 billion euros in Spain between January and September, an 11.5% increase compared to the same period in 2025.
Macroeconomic data: housing, mortgages, and industry
On the 'macro' front, the National Institute of Statistics (INE) has indicated that the buying and selling of homes increased in August by 3.4% year-on-year, reaching 49,319 transactions, the highest volume for an August since 2024. It has also detailed that the number of mortgages on homes rose by 2.3%, reaching 33,841 loans, the highest for an August since 2022.
Likewise, the agency has reported that industrial prices surged by 18.3% in September compared to the same month in 2025, 5.1 points more than in August and the highest record since November 2022, driven by the rising cost of energy.
Values of the Ibex 35 and other markets
In the first minutes of trading, the largest declines within the Ibex 35 corresponded to Telefónica (-5.77%), Santander (-5.13%) and Mapfre (-3.28%), while Solaria (+1.57%) and IAG (+1.25%) led the increases.
In the rest of Europe, the main stock exchanges were moving with mixed signs: Paris was up 0.54%, Frankfurt was up 0.4% and London was practically flat.
In the foreign exchange market, the euro appreciated against the dollar, reaching an exchange rate of 1.1208 'greenbacks', and in the fixed income market, the yield on the Spanish ten-year bond rose to 4.055%.