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how to calculate straddle price from the head ?
number of trading days remaining n , calculate sqrt(n) , for jul 11 this is sqrt(5) = 2.2
take the iv figure , this is at 17 now
take the spot for bnf it is at 31550
ATM straddle price , spot * iv * sqrt(trading days ) / 2000 = 31500*17*2.2/2000 = so about 590
can some one tell me the 31500 straddle price now pls
instead of torturing the IV solvers to get the ATM IV for the past dates , one can simply do reverse to get historical IV figures !!
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