wayneL
VIVA LA LIBERTAD, CARAJO!
- Joined
- 9 July 2004
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Does the statistical volatility you calculate include those occasional events such as Oct87, Sept01,....? Could this account for the discrepency with IV?wayneL said:1/ They are chronically overvalued. This means that their implied volatility is almost ALWAYS a few points higher than their statistical volatility.
markrmau said:Does the statistical volatility you calculate include those occasional events such as Oct87, Sept01,....? Could this account for the discrepency with IV?
Money Tree said:The biggest advantage of writing index options (for ASX) is that the INTERVAL is lower than anything else. I have posted on intervals before. Basicly the lower the interval, the less margin required when the position moves against you. Some traders were writing LHG options when the interval was 12%. This means that your RISK MARGIN was high enough to allow for a 12% stock price move. XJO is usually 2%. This is the difference between having to come up with an extra $2k or an extra $20k.....kinda important eh?
Money Tree said:Although index I.V's are higher than H.V, they are VERY LOW compared to stocks.
Money Tree said:Covered calls are LOWER RISK than a plain buy & hold strategy, so bagging of it should not go overboard. The problems arise when people are told they can get 8% a month on their money. If people already have shares, and want to improve the return while reducing the risk, covered calls are perfect. You will get around 5% p.a extra (0.5% per month lol)
wayneL said:Statistical volatility has a set, defined lookback period, usually 20 or 30 days or less.
markrmau said:bush opens his mouth unscripted.
markrmau said:So isn't that basically the reason IV is always higher than statistical volatility (particularly if only looking back at last 20/30 days)?
There is always the probability of some event (it doesn't have to be Sept 11, it could be a hurricane, downgrading of GM bonds, bush opens his mouth unscripted....) that could suddenly increase the volatitlity - and hence you have to pay (or are paid) a risk premium for this.
Or is this factored in elsewhere?
You used the term "chronic overvaluation". How big a jump in an index (say SP500) would be required to make the statistical volatility match the IV?
malachii said:WayneL
When are we getting the next installment??
malachii
When writing calls over say, XJO, is the contract based on 1 of the indice, and not 1000 like a stock?
Is it possible to buy XJO and write calls over it, and if so, what gearing level will margin lenders generally go to?
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