Switzerland 20 Index is just a number that lets you track performance of the instruments comprising the index, so you can't invest in it directly. But you can buy Switzerland 20 Index futures or funds or invest in its components.
The lowest ever quote of Switzerland 20 Index is 9985.83 CHF. It was reached on Oct 13, 2022.
Switzerland 20 Index reached its highest quote on Apr 11, 2022 — 12539.88 CHF.