there's nothing special about the market being closed tomorrow. Whether it's closed for a holiday, for a weekend, or for a stupid little storm, it has the same effect on the price of options. Think of tomorrow as a holiday
The implied volatility could increase on these weeklies. The value of the options may stay the same or decrease slightly. so theoretically, they might not decay. that's your vol increase. it could also decay slightly less than the anticipated .05 or what ever you thought it would decay. if the markets buying it, it doesn't have to decay. if for some reason, the market didn't open (which is extremely unlikely) the owners of perceived in the money calls and puts could exercise them. if you had a .25 option that you thought would be in money. you would have the option not to exercise the call. you would place a contrary exercise notice, telling your firm not to exercise. you would only lose .25 as opposed to risk associated with the stock.
<<< Atticus is saying that if you look at the implied vola calculation (output! not input!), they will likely go up (as in, option prices won't drop *as much* as you'd expect from a loss of 5 calendar days). >>> Yes, but the issue being discussed is theta. Not changes in vol or price movement. All I'm saying is theta continues, as it normally would. That no one is going to freeze (manipulate) it.
i get that they are outputs... supply and demand is the driving force in any market...... my thoughts are to a certain degree things that were going to get done today are still going to get done.. if nothing is neither created or destroyed orders will build a little and compound into a day in which the market is open.. causing an increase in vol and a decrease in realized theta. because there is built up supply and demand to be realized on the day the market will open.. theta is just a measure of the loss of premium over time.. if demand superceeds.. theta will freeze .. as in the case with earnings..
It's an interesting question. As an ex-MM I feel that you actually do start with volatility and time as the inputs, not with the option prices. In the end, obviously, supply/demand establishes an equilibrium, but the initial market is established as a function of the market-makers opinion of the fair volatility and apparent time to expiration.
Well stated. The issue is really all about that initial 1st minute of trading after the market re-opens.
I imagine if you trade volatility... the price is a derivative of volatility and time is just the line in which realized vola exacts itself upon the implies.... realized is what actually ends up determing the fair value.... fair value seems to me a hindsight thing.. "fair" respectively to a MM would to me mean that there is expected profit given the MM ers vol forecast assumption.... this is not a statement... its a question in the form of a statement... sle you can tell me if I'm far off in this..
At least the market isn't closed on Thursday & Friday. What would one do with weekly options? Take a risk in exercising OTM options based on low volume stock futures prices (if they're even open)?
If you restate in English? Realized vol is only relevant in the sense of an optimal, frictionless hedge.
Fair value of an option is determined by the expected volatility (from the perspective of a delta-hedger). This of couse, is also false, since a lot of it has to do with supply and demand for specific risk factors, especially in longer-dated options. PS. Dude, can I ask you for a favor? Could you use periods as the end of the sentence and use capital letters for the beginning of the sentence? It's very hard to read and understand otherwise.