About the SPI 20
The SPI 20 is the blue-chip index within the SPI index family and comprises the 20 largest and most liquid equities in the SPI. The SPI 20 represents about 80% of the total market capitalization of the Swiss equity market. It is free-float-adjusted, which means that only the tradable portion of the shares is considered in the index.
When a UCITS-capping was applied to the SMI in 2017, the SPI 20 was launched as an uncapped version of the SMI. In other words, prior to 2017, the SPI 20 was the SMI. The SPI 20 therefore represents the largest and most liquid Swiss equities based on free-float market capitalization without capping.
The SPI 20 is standardized at 1,500 points as per June 30, 1988. Its composition is reviewed once a year. Its calculation takes place in real time, i.e. each new transaction involving a stock included in the SPI 20 causes the index to be recalculated.
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