<p>This was indeed a box-spread trade. From Steve Smith at RealMoney:</p>
<p><strong>>>>Much has been made of the large and unusual, open interest that has appeared the S&P 500 index options as discussed in this morning's </strong><a href="http://www.thestreet.com/s/bin-laden-options-trades-have-wall-street-whispering/newsanalysis/optionsfutures/10377063.html?puc=_tscfoc&"><strong>article</strong></a><strong> and a range of online articles such as </strong><a href="http://www.homelandsecurityus.com/Options082907"><strong>this</strong></a><strong> that have the conspiracy theorists out in full force. Since it fell into the option domain, I would have been remiss in not reporting about it. </strong></p>
<p><strong>But I'm glad to now be able to confirm that this was not a cloak-and-dagger situation. It was the least glamorous of the scenarios, the box-spread trade, that explains and is the catalyst for the activity. </strong></p>
<p><strong>Dan Perper, a Partner at Peak 6, one of the largest option market makers and proprietary trading firms, told me this morning that his firm was the counterparty to a good portion of the volume and position in question. "This was done as a package in which the box spread was used [as a] means of alternative financing at more attractive interest rates" explained Perper. </strong></p>
<p><strong>Simply put, two parties agree to trade the box at a price that essentially splits the difference between current rates. </strong></p>
<p><strong>For example, the rough numbers would be that given the September 700/1700 box must settle at a value of 1,000 -- it is currently trading around 997 -- that translates into a 5% interest rate. </strong></p>
<p><strong>For the seller it is a way to borrow money at a slight discount to the prevailing rate, and for the buyer, it is a way to lend money at a low rate of return, but it's better than nothing at a time when others are scared and have painted themselves into a box (ha ha) because they have run out available funds. </strong></p>
<p><strong>Currently there are about 63,000 700/1700 boxes open. Perper expects that once the September options expire, you will see similar boxes established in the December series. As to why the September 700 put has over 116,000 contracts open, Perper thinks a good portion of that was created from the prior rollover when April options expired. <<<</strong></p>