Would you mind explaining what is this buy Delta wings strategy about? I googled it and got some airplane stuff.
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Basically Gerdhold's got the answer; my only debate would be that I used to think in terms of dVega/dVol rather than in terms of zeta. This is the sort of esoterica that you run across after a few years in optionsland.
Options that are a long way away from the money (deep-OTM or deep-ITM, doesn't matter because put-call parity) are effectively crash protection. They only come into play during big market moves, and they tend to be expensive relative to their eventual payoff. So what a lot of people (mostly unsophisticated retail) like to do is to sell those options, pocket the premium, and assume that the worst will never happen. This is what Optionsellers.com did; it's what LTCM did; it's what Victor Neiderhoffer did; and look how well it worked out for them.
I traded the other way 'round. I didn't mind owning those crash-protection options, even though they were relatively expensive (so I used to have entertainingly large time-decay bills every morning), because I knew that if everything exploded I'd be OK. Unlike Nick Taleb I wasn't obsessive about it (sometimes crash protection is too expensive!), but that was generally the way I traded.
actually im just wondering
so who is the one who won all the millions lost in this case? shouldnt it be the broker ?
These guys were trading exchange-traded options; it's not like they were buying and selling against a broker where the broker wins and you lose.
The winners were:
1) The natgas and crude options market-makers who were long the options that OS.Com were short (though they were probably hedging the long calls with short futures, so it's not like they made ALL the money);
2) The people who were outright long natgas and crude futures while OS.Com were scrambling to cover and driving the price against themselves.
(Incidentally, blowing up on natgas is a grand tradition of American markets. Amaranth Advisors famously toasted $5 billion back in '06—the largest trading loss in history at the time—by getting natgas calendar spreads titanically wrong. John Arnold, the guy on the right side of that trade, walked off as a newly-minted member of the tres commas club and launched
a rather successful education charity with the money.)