With reference to the US election Nasdaq Derivatives Markets has decided to declare that ‘fast market’ rules applies to the Swedish, Danish, Finnish and Norwegian derivatives markets effective immediately and valid until further notice.
Fast market implies changes to the ‘Cancellation and price adjustment of erroneous transactions’ rule and to the Market Maker obligations.
For cancellation and price adjustment rules during ‘fast market’ see section 2.A.11.16 under the Nasdaq derivatives markets rules.
http://business.nasdaq.com/media/chapter-2_ex...-19241.pdf
Regarding Market Maker obligations during ‘fast market’, Market Makers are allowed to use double the spread stated in the obligations.