Thanks KK.
I would not expect any change in volatility or even much of a change in liquidity. U, Z, H, K , N options currently are tradeable and have very little volume. The serial months typically have even less OI and I would not expect a big impact being that they are listed on the screen. Much of what is on the (and the spread is often very big) screen is algorithm type bids/offers, usually with the same quantity bid for as is offered.
Ex: Sept. 190 Calls may look like this: 15 for 25, with 25 offered at 65.
Other thoughts welcome, but again I do not see a major impact from this new listing of the serial options- at least not while the floor is open for option trading.
gt.