Fantastic journal... good to have you back, riskarb...
Quote from riskarb:
DAX double:
Traded the 7d 4900/4750 double barrier[range]. Entire premium paid is lost if either strike is hit. This differs from a conventional double-knockout in which the opposing strike would remain "live" if one were hit. A fixed payout of $150k EUR is paid if neither k/o barrier is reached. Position risk and payment for the position is $50k EUR. I've been using various models to price; finite difference, Laplace transforms, among others.
Dax double barrier[binary k/o range] -- 4900/4750 K/Os
Premium: $50,000 EUR
Payout: $150,000 EUR [includes prem paid]
Expires: Aug 3, 2005
Negative edge: $9,000 EUR
A short strangle would be the analogous position in the vanilla-options. Obviously there are significant differences. There are no binary conditions with a vanilla straddle, the risk is unlimited on the call[vanilla].
Defined: Short gamma/vega binary-strangle with a debit haircut. I own a piece of this trans, brother's fund is the holder.