B1G Numbers September 2026: Key Figures from Exchanges

In September, the combined turnover of SIX Swiss Exchange and BME Exchange was up by a third compared to August, reaching CHF 168.5 bn, while the number of transactions rose by 17.6% to over 8.1 mn. Over the course of the month, the SMI fell by 3.2% and the IBEX35 by 2.7%, resulting in year-to-date performances of 4.2% and 12.2% respectively.

SIX Swiss Exchange saw the biggest turnover increase in the equities segment, up almost 34% and reaching CHF 88.9 bn. This brought the total turnover close to CHF 112 bn, +28% compared to the previous month. BME also recorded a positive uptick in trading turnover in September. With EUR 59.9 bn, it was up over 45% compared to August. 

With regards to new clients, SIX Swiss Exchange welcomed two new ETF issuers: Pictet and HANSAINVEST. In Spain, BME Scaleup welcomed Eolo Toys as the 13^th company to join BME's growth markets in 2026. 

The B1G Numbers videos provide transparency for the the market and wider public. This includes the development of trading volumes, the number of trades and the performance our blue chip index SMI, among other highlights. Discover previous editions