I'm not sure about the options exchanges; they're not regulated the same way and are a good example of exchanges with extended trading hours in the first place. (money.stackexchange.com)
In addition, CBOE plans to launch Extended Trading Hours for options on both the S&P 500 ® and the VIX indexes in late October 2014, contingent upon completion of systems enhancements and SEC approval. (spvixviews.com)
Moves to extend trading hours on weekdays and on Sundays could be a hit with voters, according to a recent survey conducted for the Chamber of Commerce and Industry of WA, with 59 per cent of shoppers keen for longer weekday trade. (businessnews.com.au)