PSI (PSI 20) Index — Level, Chart & Constituents

What the PSI (PSI 20) measures

The PSI (PSI 20) is a stock market index that tracks the performance of the 20 largest companies listed on Euronext Lisbon. It is the main barometer of the Portuguese equity market and a way to see how the broader European economy is moving. Because it is a free-float market-cap weighted index, companies with a higher market capitalisation have a larger influence on the index level. The PSI20 is part of the European index landscape alongside peers such as the OMX Copenhagen 25, the BEL 20, the AEX, the OMX Helsinki 25, the ATHEX Composite, the STOXX Europe 600 and the FTSE/ATHEX Large Cap.

Key numbers explained

• The current index level is 9,704.6 points, which is a unitless number that reflects the aggregate market value of the 20 constituents relative to a base period.
• Today's price change is +0.21%, showing the percentage movement of the index from the previous close.
• Today's trading range was 9,695.74 – 9,753.79, indicating the lowest and highest level reached during the session.
• The 52-week low is 7,903.27 and the 52-week high is 9,753.79, showing the range the index has traded in over the past year.
• The index is denominated in EUR, so its level reflects the euro-denominated market value of its constituents.
• The index level is a price return figure, meaning it reflects changes in the share prices of the constituents without assuming reinvestment of dividends.

What to watch

The level of the PSI (PSI 20) can be influenced by macroeconomic data releases, interest rate decisions, corporate earnings reports, and geopolitical events that affect European markets. Changes in the euro's value relative to other currencies can also affect the index, particularly for companies with significant international revenue. Sector rotations, shifts in investor risk appetite, and changes in the composition of the index itself are additional factors that can move the level over time.