SMI Expanded
| Foundation | November 15, 2004 (history from January 3, 1996) | 
|---|---|
| Operator | SIX Swiss Exchange | 
| Exchanges | SIX Swiss Exchange | 
| Trading symbol | SMIEXP | 
| Constituents | 50 | 
| Type | Large and mid cap, price index | 
| Market cap | CHF 1,390 billion (full, end 2017) | 
| Weighting method | Market value-weighted, free-float-adjusted | 
| Related indices | SMI, SMI MID, SPI | 
| Website | |
| ISIN | CH0019399853 | 
| Reuters | .SMIEXC | 
| Bloomberg | SMIEXC | 
The SMI Expanded is a capitalization-weighted stock index of large-cap and mid-cap companies listed on the SIX Swiss Exchange.
It is made up of the components in the Swiss Market Index (SMI) and in the SMI MID, representing more than 90% of the total SPI market capitalization. It was created on November 15, 2004, and retroactively computed from January 3, 1996, with a calibration on 1,000 points as of December 31, 1999.