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Two Things You Absolutely Must Know About Market Panics |
The Federal Reserve is doing its thing to calm the maniacs running around like chickens with their heads cut off. And the president and his administration have come out with a program to bail out who knows how many folks with bad financial judgment. |
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| Two Things You Absolutely Must Know About Market Panics |
| Tuesday, 22 January 2008 | ||||||||
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Today I wanted to tell you about Tiddles the Human Bowling Ball -- but he’ll have to wait until tomorrow. Right now, we’ve got to address some more serious business. Namely, there are two things you simply must understand about market panics. When Panic Strikes I returned from the gym this morning to find a pink copy of The Financial Times in front of my hotel-room door. The front page headline was stark. “Fears spark global plunge,” it said.While American markets were closed on Monday in observance of Martin Luther King’s birthday, the rest of the world lost its collective head. It might have had something to do with The Wall Street Journal’s talk of “severe recession” right above the fold. Whatever the reason, things were ugly.The numbers weren’t pretty. Indexes in Britain and Frankfurt saw their biggest single-day drops since 2001. Asian markets swooned. India’s Bombay Sensex dropped 5%; the Nikkei in Tokyo gave up nearly 6%; and Hong Kong’s Hang Seng dropped close to 9%. Today isn’t looking much better. World indexes are either dropping hard or swinging wildly as I type. (As of this writing, U.S. markets haven’t opened yet.) It’s not a fun subject. In fact, many would rather avoid it. Yet it doesn’t take a rocket scientist to see that panic is setting in. Correlation Is KeyTo understand what happens in market panics, it’s important to first grasp the concept of correlation.Correlation is simply a measure of how assets move in relation to each other. When the stocks of two companies move in the same direction most of the time, they are said to be highly correlated. The same is true of indexes, currencies, commodities and so on. The correlation coefficient is the standard way to measure correlation. It runs between plus one (1.0) and minus one (-1.0). Two hypothetical markets with a correlation of one would move in the same direction 100% of the time. Two markets with a correlation of minus one -- said to be inversely correlated -- would move in perfectly opposite directions 100% of the time. All measurements fall somewhere between the two extremes of plus one and minus one. (A correlation of zero means there is no relationship; relative movements between the two markets are random.) A Correlation of One Why is this important to understand?Because when panic sets in, the broad correlation of markets approaches one. The bigger the panic, the stronger this tendency becomes. Markets across the globe begin to move in lockstep.This type of lockstep movement confounds the efficient market theorists. It just doesn’t make sense to them. It seems completely irrational for all assets everywhere to start moving sharply in the same direction at the same time. And in a very important sense, it is highly irrational. There’s no valuation-based reason why assets across the globe should suddenly get hammered all at once. Who the heck went crazy with the discount stickers? It seems to fly in the face of logic. But on another level it makes total sense.
One Portfolio, One CrowdGlobal markets, you see, are connected in a way that efficient market theorists don’t think about. They are connected in a big way by leveraged speculators.At first glance, there doesn’t seem to be a logical connection between, say, the British pound, natural gas and semiconductor companies. But a natural connection exists in the fact that many aggressive hedge funds trade all these things. When a leveraged fund takes a hit in one area of the portfolio, it has to cut back in other areas to reduce risk. The portfolio thus becomes the contagion mechanism. If you have a number of players who are long the financials and long gold, for example, and suddenly the financials are getting killed, you’re likely to see gold sell off a bit, too. Does this make sense? From a fundamental standpoint, not really. From a risk management standpoint, though, many of these leveraged players have no choice; they have to sell the good along with the bad to get their butts out of harm’s way. On top of the portfolio contagion effect, panic can spread through the groupthink effect. The reason that markets are mostly efficient, in a mostly-but-not-always-rational sort of way, is because investors’ opinions generally cancel each other out. When the opinions of the crowd are diverse and varied, the crowd acts like a weighing machine; outliers are averaged out, and reasonable valuations are the net result. When the crowd develops a single-minded opinion, however, the natural market mechanism goes haywire. There is a critical mass of opinion -- a sort of groupthink tipping point -- beyond which markets can get pushed in extreme directions very quickly. This happens on both the upside and the downside. In the dot-com boom and the housing bubble, we saw it on the upside; now we are seeing it on the downside. Too many people believing and doing the same thing at once overrides the system; it messes up how markets are hypothetically supposed to work. The Two Things You Must KnowNow that we’ve got the basics (correlation and crowds) covered, here are the two things you must know about market panics:1 Market panics are not a rational process; almost by definition, they are highly irrational.
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