ATLASIBEX 35 today: level, companies and odds
The IBEX 35 closed at 19,033 (+0.23%) on Oct 26, 2026. It has 35 members and ATLAS covers 33 of them, the largest being Banco Santander, Industria de Diseno Textil, and Iberdrola. Below: each member's price, how far it trades from ATLAS fair value and the model probability of a higher close in a month.
The IBEX 35 is the benchmark index of the Spanish stock market, made up of the 35 most liquid companies listed on the Spanish exchanges.
Data as of Oct 27, 2026.
Index level
IBEX 35 closed at 19,033 on October 26, 2026, up 0.23% on the previous session.
ATLAS breadth
32 of 33 members (97%) have a probability above 50% of closing higher in a month in ATLAS's model.
Of 29 members with a fair value estimate, 16 trade at least 8% below it and 8 at least 8% above; the median gap is -16%.
How to read it: ATLAS's calibrated model uses the same long-run drift for every stock, so the share above 50% mostly reflects how many members are calm enough (low volatility) to sit above a coin flip. It gauges how calm the index is, not where it is going.
Best and worst members on the last close
Best
| GRF.MCGrifols | €10.71 | +5.3% |
|---|---|---|
| IDR.MCIndra A | €62.40 | +4.1% |
| IAG.MCInternational Consolidated Airlines | €4.91 | +4.0% |
| SLR.MCSolaria Energía y Medio Ambiente | €14.20 | +3.5% |
| ACS.MCACS Actividades de Construccion y Servicios | €90.15 | +3.0% |
Worst
| TEF.MCTelefonica | €3.20 | -6.4% |
|---|---|---|
| SAN.MCBanco Santander | €11.15 | -3.1% |
| CLNX.MCCellnex Telecom | €25.42 | -3.0% |
| MAP.MCMapfre | €4.31 | -1.8% |
| NTGY.MCNaturgy Energy | €30.54 | -1.8% |
Moves are for the latest stored close of each stock.
All IBEX 35 companies
Weights are each member's share of the combined market value of the 33 companies listed here: an estimate, not the official index weighting.
Sector mix
Financial Services is the biggest sector with 40% of the combined market value of the members.
How this page is built
Members: the list of companies in the IBEX 35 comes from an index-data provider and is refreshed every week. Companies ATLAS does not publish (too small, no data or not listed in the country) are left out, so this page covers 33 of 35.
Price, fair value and probability come from the same stored data as each company page; probabilities use ATLAS's calibrated one-month model. The index level and daily change are for the last close of the index.
Limits: this is not the official index factsheet. Weights are estimated from market value, probabilities are not forecasts, and nothing here is investment advice.
Frequently asked questions
What is the IBEX 35?
The IBEX 35 is the benchmark index of the Spanish stock market, made up of the 35 most liquid companies listed on the Spanish exchanges. ATLAS covers 33 of its 35 members.
Which are the biggest companies in the IBEX 35?
By market value the largest members are Banco Santander, Industria de Diseno Textil, and Iberdrola. Together the top three make up 46% of the combined market value of the 33 members listed here.
How many companies are in the IBEX 35?
The index has 35 members; ATLAS publishes 33 of them.
What does ATLAS breadth mean for the IBEX 35?
It is the share of members whose probability of closing higher in a month is above 50% in ATLAS's calibrated model: 97% today (32 of 33). Because the model uses one long-run drift for all stocks, it mostly measures how calm the members are. It is not a forecast for the index.
Which IBEX 35 stocks moved the most on the last close?
On the latest stored close, Grifols rose the most (+5.3%) and Telefonica fell the most (-6.4%) among members.
Can I invest in the IBEX 35?
An index is a list, not a product, so you cannot buy it directly. Funds that replicate it exist in many markets, but ATLAS does not recommend products. Check costs, taxes and currency before choosing any.
How often is this page updated?
Prices and probabilities are refreshed every day and the page is rebuilt at least every 6 hours. The member list is refreshed every week.
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Other indices
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Information only, not investment advice. ATLAS estimates come from statistical models using public data; they can be wrong, and past results do not guarantee future ones. Disclaimer