Hi again,
In deciding for the follow up actions to be taken, we need to access the impact of changes in delta of the both sides of the trade. Two things will impact delta
1. Nifty level
2. Days to Expiry
One step at a time:
First of all lets see the impact of changes in nifty levels on the delta value of the put options.
We will consider the range of 3400 3800, we do not expect nifty to move in the range of 400 points in a day, although sensex can and does
(remembering 28.4.06)
Case I (Going Going and Gone )
Nifty = 3650 Delta for SP3600 Put = -0.4323
Nifty = 3700 Delta for SP3600 Put = -0.4069
Nifty = 3750 Delta for SP3600 Put = -0.3822
Nifty = 3800 Delta for SP3600 Put = -0.3583
Case II (Meter Down, Down, Down)
Nifty = 3550 Delta for SP3600 Put = -0.4849
Nifty = 3500 Delta for SP3600 Put = -0.5119
Nifty = 3450 Delta for SP3600 Put = -0.5393
Nifty = 3400 Delta for SP3600 Put = -0.5668
The above calculations help us to understand how the swings in nifty will impact the delta of the put side of the equation.
Similar calculations can be done on daily basis with days to expiry 15, 14, 13 and so on
Now lets see the impact of Days to Expiry on the value of delta
Nifty = 3600
Days to Expiry: 16 Delta for SP3600 Put = -0.4583
Days to Expiry: 15 Delta for SP3600 Put = -0.4596
Days to Expiry: 10 Delta for SP3600 Put = -0.4670
Days to Expiry: 05 Delta for SP3600 Put = -0.4767
Days to Expiry: 04 Delta for SP3600 Put = -0.4791
Days to Expiry: 03 Delta for SP3600 Put = -0.4819
Days to Expiry: 02 Delta for SP3600 Put = -0.4852
Days to Expiry: 01 Delta for SP3600 Put = -0.4896
To summarize it, the ve value for delta increases as the put option comes into money and decreases as it goes out of money, also the ve value for delta for the put option increases with every day as expiry comes near.
Now to calculate the impact on the delta value of Nifty Futures
We have a problem here, we do not know if we consider the values of nifty spot or nifty futures. We have used spot values to calculate delta for options and we will be buying and selling futures, hence the confusion. Anyway as always there is only one way to know, to make a choice, so I choose NF values. Also it is clear from the posts above that the delta value of long ftrs is 1.
Now as the price swings, we balance the delta on either side to get a delta neutral trade.
But with only 2 lots NF and 4 of Puts to balance the trades the gaps will have to be high, maybe too high to do anything meaningful.
Guess, we are at a dead end!
Will need to do some more number churning.....
(My crude calculations tell me that we will have our next trade only after 60 to 75 points on the up side and 50 to 60 on the down side.)
Regards
Sanjay
Lesson Learned: Never ignore the previous Lesson Learned!