SIX Swiss

SIX Swiss Exchange (formerly SWX Swiss Exchange), based in Zurich, is Switzerland's principal stock exchange (the other being Berne eXchange). SIX Swiss Exchange also trades other securities such as Swiss government bonds and derivatives such as stock options.
The main stock market index for the SIX Swiss Exchange is the blue-chip index, the SMI, or Swiss Market Index. The index consists of the 20 most significant and most liquid large and mid-cap SPI equity-securities based on the free float market capitalisation.
SIX Swiss Exchange was the first stock exchange in the world to incorporate a fully automated trading, clearing and settlement system in 1995. The exchange is controlled by an association of 55 banks. Each of these banks has equal voting rights in the matter of decision making concerning the management and regulation of the exchange.
SIX X-Clear Ltd provides clearing and acts as the central counterparty for clearing trades, securities settlement and custody services.
Other services.
SIX Group as well as being a stock exchange provides a number of other services through separate subsidiaries, these include;
Hours.
The exchange's normal trading sessions are from 09:00 to 17:30 on all days of the week except Saturdays, Sundays and holidays declared by the Exchange in advance.