ATLASPSI today: level, companies and odds
The PSI closed at 9,176 (-0.75%) on Oct 26, 2026. It has 16 members and ATLAS covers 15 of them, the largest being EDP - Energias de Portugal, Galp Energia SGPS, and Banco Comercial Portugues. 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 PSI is the benchmark index of the Lisbon stock exchange (Euronext Lisbon), formerly known as the PSI 20, and groups the largest Portuguese listed companies.
Data as of Oct 27, 2026.
Index level
PSI closed at 9,176 on October 26, 2026, down 0.75% on the previous session.
ATLAS breadth
15 of 15 members (100%) have a probability above 50% of closing higher in a month in ATLAS's model.
Of 13 members with a fair value estimate, 8 trade at least 8% below it and 4 at least 8% above; the median gap is -40%.
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
| EGL.LSMota-Engil SGPS | €4.62 | +2.8% |
|---|---|---|
| SEM.LSSemapa | €19.50 | +2.1% |
| CTT.LSCTT Correios de Portugal | €5.50 | +1.7% |
| NVG.LSThe Navigator Company | €2.98 | +1.5% |
| TDSA.LSTeixeira Duarte | €0.431 | +1.4% |
Worst
| GALP.LSGalp Energia SGPS | €20.47 | -10.8% |
|---|---|---|
| JMT.LSJeronimo Martins SGPS | €18.04 | -1.8% |
| NOS.LSNOS S.G.P.S. | €5.12 | -1.0% |
| COR.LSCorticeira Amorim | €6.88 | -0.3% |
| SON.LSSonae SGPS | €2.14 | -0.2% |
Moves are for the latest stored close of each stock.
All PSI companies
Weights are each member's share of the combined market value of the 15 companies listed here: an estimate, not the official index weighting.
| # | Company | Price | 1 day |
|---|---|---|---|
| 1 | EDP.LSEDP - Energias de Portugal | €4.76 | +1.4% |
| 2 | GALP.LSGalp Energia SGPS | €20.47 | -10.8% |
| 3 | BCP.LSBanco Comercial Portugues | €1.07 | +1.2% |
| 4 | JMT.LSJeronimo Martins SGPS | €18.04 | -1.8% |
| 5 | SON.LSSonae SGPS | €2.14 | -0.2% |
| 6 | NOS.LSNOS S.G.P.S. | €5.12 | -1.0% |
| 7 | RENE.LSREN - Redes Energéticas Nacionais SGPS | €3.55 | +0.3% |
| 8 | NVG.LSThe Navigator Company | €2.98 | +1.5% |
| 9 | SEM.LSSemapa | €19.50 | +2.1% |
| 10 | EGL.LSMota-Engil SGPS | €4.62 | +2.8% |
| 11 | ALTR.LSAltri SGPS | €4.31 | +0.8% |
| 12 | COR.LSCorticeira Amorim | €6.88 | -0.3% |
| 13 | CTT.LSCTT Correios de Portugal | €5.50 | +1.7% |
| 14 | IBS.LSIbersol SGPS | €10.28 | -0.2% |
| 15 | TDSA.LSTeixeira Duarte | €0.431 | +1.4% |
Sector mix
Utilities is the biggest sector with 28% of the combined market value of the members.
How this page is built
Members: the list of companies in the PSI 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 15 of 16.
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 PSI?
The PSI is the benchmark index of the Lisbon stock exchange (Euronext Lisbon), formerly known as the PSI 20, and groups the largest Portuguese listed companies. ATLAS covers 15 of its 16 members.
Which are the biggest companies in the PSI?
By market value the largest members are EDP - Energias de Portugal, Galp Energia SGPS, and Banco Comercial Portugues. Together the top three make up 65% of the combined market value of the 15 members listed here.
How many companies are in the PSI?
The index has 16 members; ATLAS publishes 15 of them.
What does ATLAS breadth mean for the PSI?
It is the share of members whose probability of closing higher in a month is above 50% in ATLAS's calibrated model: 100% today (15 of 15). 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 PSI stocks moved the most on the last close?
On the latest stored close, Mota-Engil SGPS rose the most (+2.8%) and Galp Energia SGPS fell the most (-10.8%) among members.
Can I invest in the PSI?
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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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