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Recently, there's been some discussion regarding
the curious divergence between implied volatility (^VIX) and the underlying
index (^OEX). Typically, volatility rises as the market drops, presumably
due to the higher demand for portfolio protection, and the increase in upside
speculation. However, recently, we've seen VIX declining while OEX was
falling as well (though, the last few days, VIX and OEX have been conforming to
their more typical relationship).
Here are a couple of charts to illustrate this
relationship, along with a tentative forecast.
First a quick look at where a few of the well-known
indices have been over the past couple of years:
<IMG height=288 alt=Chart
src="http://cchart.yimg.com/z?s=^oex&c=^ndx,^spc,^ixic,^dji&a=v&p=s&t=2y&l=on&z=m&q=l"
width=512 border=0>
This is a percentage change chart
showing the Nasdaq's dramatic rise and fall relative to the other indices. It
also shows that ^OEX is strongly correlated to the S&P 500 (^SPX).
Here's a chart of just ^OEX:
<IMG height=192 alt=Chart
src="http://chart.yahoo.com/c/2y/_/_oex.gif" width=512 border=0>
And its big brother, the S&P
500:
<IMG height=192 alt=Chart
src="http://chart.yahoo.com/c/2y/_/_spx.gif" width=512 border=0>
As you can see, it has been downtrending
since Mid-May, and the longer term downtrend starting in Sept-2000 remains
unbroken in spite of a sharp rally which began in April and fizzled out about a
month later. here's ^VIX, the implied volatility of ^OEX options:
<IMG height=192 alt=Chart
src="http://chart.yahoo.com/c/2y/_/_vix.gif" width=512 border=0>
VIX followed its usual script from
Sept.-2000 to April-2001, making a low in Sept. as the market topped, and a high
in April when the market bottomed. The mid-Nov. 2000 bottom, however, was a bit
of an anomaly, because VIX made a low around 20, at the end of decent rally, but
continued to climb higher all the way into March-2000 as the index rallied
another 25% higher. It is possible for the OEX to keep on climbing even
after VIX puts in a near-term low. For the sake of argument, I'm going to
assume that isn't what is happening this time around, and we're seeing the more
typical VIX-bottoms-and-OEX-tops pattern.
If the VIX/OEX relationship holds its
usual course and does a repeat of the Sept-2000 to April-2001 decline, we might
expect OEX (and thus, the S&P 500) to drop 15%-25%, over the course of the
next 4-8 months. Should this occur, the S&P might dip below 1000,
possibly as low as 900, breaking the 52-wk low of 1082.
Evidence that the S&P is instead
ready to rally, and to reverse the downtrend, would be a break of the
downtrend line made up of the tops in Sept-2000 (1500, approx), Jan-2001 (1375
approx.), May-2001 (1300 approx). The downtrend line currently stands at
about the 1275 level, with the S&P at 1207 (today's
close).
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