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Non-Tech : Derivatives: Darth Vader's Revenge -- Ignore unavailable to you. Want to Upgrade?


To: Worswick who wrote (658)12/1/1998 4:21:00 PM
From: Michael Friesen  Read Replies (1) | Respond to of 2794
 
I wonder if some long-term technical analysis would help Fleck not be too "early"?



To: Worswick who wrote (658)12/3/1998 11:14:00 PM
From: Thomas M.  Read Replies (1) | Respond to of 2794
 
"Long-Term Capital notwithstanding, hedge funds are here to stay. One reason: They create lots of business for Wall Street."

forbes.com

Tom



To: Worswick who wrote (658)12/4/1998 12:06:00 AM
From: Thomas M.  Respond to of 2794
 
forbes.com

Nobel Laureates With Black Boxes

By David Dreman

THE LONG-TERM CAPITAL MANAGEMENT
debacle came within a hair's breadth of creating a
financial panic. Can it happen again? Yes, and
next time we may not be so lucky. Two Nobel
Prize winners were shareholders in Long-Term
Capital. Myron Scholes was one of the
originators of the Black Scholes option pricing
model. Robert Merton developed the theory
further. Both model and theory are rooted in the
Efficient Market Hypothesis, which I have so
frequently criticized. This theory holds that
markets always react rationally to developments.
This year was not the first time that these
gentlemen and their theories have cost us all
dearly: Variations of their formula were the prime
cause of the Oct. 19, 1987 crash and the
near-meltdown of the domestic financial system
the following day.

In 1987 a variation of the Black Scholes model
caused two trading strategies—portfolio
insurance and index arbitrage—to combine into a
doomsday machine that cascaded tens of billions
of dollars' worth of stock onto a collapsing
market. The more it fell, the more the model
ordered the computers to sell. It was only after
the plug was pulled on these interactive
computer-driven strategies that the decline was
finally halted.

The Brady Commission investigating the 1987
crash put part of the blame, but only part of it, on
the trading strategies derived from the preachings
of Merton and Scholes. By coincidence, perhaps,
another Long-Term Capital partner, David
Mullins, later a Federal Reserve vice chairman,
was associate director of the Brady Commission
and, along with the executive director, Robert
Glauber, played a key role in selecting the senior
investigative staff.

Note this: Nearly the entire Brady staff either
believed in the unrestricted use of financial
derivatives or made megabucks using them.
Nobody who was vocal about the potential
dangers was appointed to the staff. Had there
been a genuine diversity of opinion represented
on the panel, I do not think that this variation of
the model would have gotten off so lightly.

And thus variations of the Black Scholes model
continue to play the crucial role in pricing hedging
and arbitrage strategies. It assumes that any
panic, any unreasonable movement in the market,
will be stopped by rational buyers or sellers
moving in and stopping it. This idea, which runs
counter to real world experience, seems to have
mesmerized Wall Street at its highest levels. It's
almost as though The Street were mesmerized
into thinking that these academicians and the
traders who followed them possessed magic
black boxes.

But investors are not as emotionless as the
computers they program. If enormous selling
pressures develop, or fear sweeps a
marketplace, buyers simply evaporate. They do
not act rationally; they do not even stop to think.
Thus the 41.5% drop in the S&P 500 futures in
the 1987 crash, or the near-collapse of credit
markets in 1998. In a thoroughly rational world,
the market could not have been worth 2500 on
the Dow one day in 1987 and only 1800 a few
days later. Nor would the "flight to quality" have
gone as far as it did in October of this year.

It is sad that one of the staunchest defenders of
this gobbledygook science is the Financial
Analysts Journal, whose first editor was
Benjamin Graham. Its editorial board has for
years been a club made up primarily of efficient
market believers. Thus, almost immediately after
the 1987 crash, the Journal published an article
by Mark Rubinstein, an inventor of portfolio
insurance and one of its leading practitioners.
Guess what? His article defended portfolio
insurance and blamed everything else but it for
the crash.

The Financial Analysts Journal is not alone in
being a captive of the efficient market crowd. The
academic journals have become a tight elite that
allow only the approved academic theorists of the
day or other believers to publish. They don't burn
the work of dissenters. They don't have to. They
just don't publish it.

The prevalence of the Efficient Market
Hypothesis does not initiate panics, but it permits
and encourages practices that make them worse.
As long as this discredited theory holds Wall
Street in thrall, we will have other 1987s, other
1998s.