Skip to content

Gamma Hemorrhage

The third quarter of 2008 made veterans out of option traders that did not want to become veterans.  After the fall of Lehman Brothers, option trading experienced persistent market dislocations that had never occurred in the history of options trading.  Yes, Black Monday 1987 was a vastly horrific day, but the persistent market volatility of late 2008 was only surpassed by the great depression.  For the “sophisticated” option traders and delta hedgers, it caused more than a few grey hairs.  In fact, the stress testing and VaR calculations that preceded 2008 would never tell you that you should prepare for Sep-Dec 2008.  In reality, market dislocations during late 2008 provides a great stress test for any strategy that you could possibly contemplate.

In a follow-up to our explanation of delta hedging, how about we look at the same simple strategy going through the post-Lehman world.  I was looking for actual option data, but after the CBOE option ticker methodology change in 2010 it is a bit difficult.  Instead, I will look at a simple October 2008 struck puts on SPY using implied volatility from the VIX which is close enough for our purposes.

Assume that on September 11th, 2008 you sold 5 contracts of the $120 strike October put and 5 contracts of the $110 strike October put.  You feel that the sub-prime turbulence, past buyout of Bear Stearns, and rumors about Lehman Brothers provide a ripe opportunity to sell put options at attractive implied volatility levels.  You are willing to risk 500*$120+500*110 = $115,000 on this trade.  Then reality sets in:

So you might have thought you were a smart naked put seller with that $948 of premium for less than a month…which would equate to $948*12/115,000 = 10% in annual premium!  On the flip side, if you sold those naked options with a bit over a month left to expiration, you would have lost $20k in that month, or about 18% in a single month.  If you delta hedged that portfolio you were still down $5.4k or about 5% of principal at risk.  Now just think of you had a large leveraged portfolio of these options and some longer dated positions that were very sensitive to changes in implied volatility….  Who could ever comprehend how Hartford got into trouble…


Posted in Derivatives, Educational, Markets.

Tagged with , , , , , , , , , .

Copyright © 2009-2013 SurlyTrader DISCLAIMER The commentary on this blog is not meant to be taken as an investment advice. The author is not a registered investment adviser. There is no substitute for your own due diligence. Please be aware that investing is inherently a risky business and if you chose to follow any of the advice on this site, then you are accepting the risks associated with that investment. The Author may have also taken positions in the stocks or investments that are being discussed and the author may change his position at any time without warning.

Yellow Pages for USA and Canada SurlyTrader - Blogged