The Cboe just announced that they will list new Wednesday Weekly options in the SPX. http://ir.cboe.com/press-releases/2016/02-01-2016-165546551.aspx So now there will be two weekly expirations!
I wonder it they will expire Mid Wed, and by th at I mean mid Week from when the markets open up Mon.
I have an idea. Earnings Options. Options that expire the day after earnings on a select group of stocks such as AAPL, GOOGL, MSFT, FB, TSLA, PCLN, AMZN, etc. I think they would be very popular.