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tricky69
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Joined: November 27th, 2007, 3:18 pm

Risk Reversal Help

November 28th, 2007, 8:53 am

Morning Everyone - Was hopeing someone might be able to help me on this, i need a formula for working out what the vols should be ?E.g. if i have a 2yr eurczk 25 dta rr at 0.2 - how do i work out what the vols should be ?thanks vm
 
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thomssi
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Joined: August 25th, 2005, 2:45 am

Risk Reversal Help

November 28th, 2007, 10:07 am

You can't, you need strangle 25 delta quote as well. Between them they define the shape of the skew curve.When you have atm and str you can use the following.vol for 25 delta call = str+rr/2put 25 delta = str-rr/2
 
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tricky69
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Joined: November 27th, 2007, 3:18 pm

Risk Reversal Help

November 28th, 2007, 10:19 am

QuoteOriginally posted by: thomssiYou can't, you need strangle 25 delta quote as well. Between them they define the shape of the skew curve.When you have atm and str you can use the following.vol for 25 delta call = str+rr/2put 25 delta = str-rr/2so if the atm is 4.05 for the 2yr, with rr obviously 0.2 and 2yr flies about 0.2 as well... what would be the calculation to get the vols ?
 
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thomssi
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Joined: August 25th, 2005, 2:45 am

Risk Reversal Help

December 10th, 2007, 7:12 am

QuoteOriginally posted by: tricky69QuoteOriginally posted by: thomssiYou can't, you need strangle 25 delta quote as well. Between them they define the shape of the skew curve.When you have atm and str you can use the following.vol for 25 delta call = str+rr/2put 25 delta = str-rr/2so if the atm is 4.05 for the 2yr, with rr obviously 0.2 and 2yr flies about 0.2 as well... what would be the calculation to get the vols ?25d call = 4.05 + 0.2 + 0.2/2 = 4.3525d put = 4.05 + 0.2 - 0.2/2 = 4.15