Mark to Model ?
#1
Posted 10 August 2007 - 08:39 AM
#2
Posted 10 August 2007 - 08:48 AM
Analysts at Citigroup said investors using quantitative strategies, or computer models, are having a particularly difficult time.
"The unexpected and dramatic rise in volatility over the last month has created a difficult environment for many quantitative investment managers," they said. "Many stock selection factors that are used in most quantitative models, such as, value, quality, price reversal, and earnings momentum have produced increasingly poor performance."
Translation: "The over-optimized curve fitting that appeared to be the key to the lock stopped working when the trend changed."
FWIW, it sure looks like good old fashioned TA is working just fine, if not better than ever.
Mark
Mark S Young
Wall Street Sentiment
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#3
Posted 10 August 2007 - 09:11 AM
Analysts at Citigroup said investors using quantitative strategies, or computer models, are having a particularly difficult time.
"The unexpected and dramatic rise in volatility over the last month has created a difficult environment for many quantitative investment managers," they said. "Many stock selection factors that are used in most quantitative models, such as, value, quality, price reversal, and earnings momentum have produced increasingly poor performance."
Translation: "The over-optimized curve fitting that appeared to be the key to the lock stopped working when the trend changed."
FWIW, it sure looks like good old fashioned TA is working just fine, if not better than ever.
Mark
Here is the whole problem with the space using them - once the dominoes start to fall nobody knows how far it unwinds and how much other stuff will be taken with it. Many funds are inter-realted and interconnected. Thats why the notional value of 300 trillion in derivatives or so should scare people, because everything and everyone has hedged each other and other losses. Is the VIX really high enough yet? There could be a lot more fear b4 this one is over.
"Many players in this part of the hedge-fund business have similar positions and use lots of leverage, or borrowed money, to increase their bets. However, that magnifies even small losses. Some of these hedge funds also have relatively permissive redemption periods, allowing investors to take their money out every month, with 30 days' notice or less.
So if losses trigger investor redemptions, these funds may have to sell lots of their positions. That, in turn, puts more pressure on the historical relationship between related securities, handing more losses to other hedge funds in the space.
If such positions are sold by lots of managers at the same time, the most leveraged funds get hit the hardest, possibly forcing big liquidations of portfolios, which triggers a chain reaction. "
#4
Posted 10 August 2007 - 09:23 AM
Mark S Young
Wall Street Sentiment
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