Quote from spindr0:
It's a question of trading (option) volatility only if IV's are gyrating around.
It's tough to suggest the "ideal" option position for this w/o knowing the magnitude of the daily ROC. If the A-B spread has risen to exaggerated levels (A has risen, B has fallen) and you expect a decent reversal, buying an ATM put on A and an ATM call on B would be the least complex way and most likely to succeed. If it's a slow moving A-B spread then this pseudo straddle would suffer from time decay. Anything that you add to offset that time decay could be problematic (butterflies, condors, ratios, etc.) and I would hold off on that complexity until getting the daily trading pattern sorted out.
I would suggest that you observe and plot/record the intraday spread. If it oscillates enough intraday, you may have something tradeable. If it's a pure index, a problem. But if there are ETF surrogates, you can buy the undervalued one and short the overvalued one when the spread is inordinately wide (under/over valued being a somewhat subjective terms).
Intraday you can shift your bias to one side if there's some recognizable metric driving price change such as rising/falling market or financials/oil/gold prices, etc. (add more to the long side or add more to the short side or conversely, reduce one side). You would then restore the balanced 1:1 pairing by day's end, closing it out completely if the A-B regression took the spread back to compressed levels.
In order to augment such a pair trading system you really have to believe in the regression and be willing to add to the position when it moves against you because it's truly impossible to know where the maximum is. All you'll know at a perceived extreme is that you're a lot closer to the max than not.
Hope this helps in some way![]()
spindr0,
Magnitude of the daily ROC is relative as an entry would only be considered when the spread is in a statistically abnormal state, lets just say with a probability of 5% or less of occurrence. The daily trading pattern is already sorted out as this is just a matter of creating a spreadsheet that compares price % changes in both indices (the spread) over various time frames and then performs standard deviation calulations. All of my data is based on a day to day basis as opposed to intraday as I am a position trader.
You hit the nail on the head when you said that determining the value of each index (or any financial instrument for that matter) is subjective. I wish to avoid any such wasted effort and focus solely on the spread, if possible. I know this goes against the grain of typical pairs trading.
I am very comfortable with regression to the mean and when I establish positions such as the one we are discussing, I enter it in small quantities and build it over time. I have enjoyed consistent success with small drawdowns in this manner. However, entries come along rarely due to the requirements for the "exagerration" of the underlying, and so when I enter, regression to the mean occurs quite rapidly.
Thanks.