I should make it clear from the beginning; I’m convinced that there is NO such a thing as a “hedge fund conspiracy”, I just wanted to come up with a catchy title, but if there were one (even though there is no) the online newspaper I want to write about would be on their payroll.
Arbitrage funds are making financial markets efficient. They are driving the price of stocks to its fundamental value, by selling (shorting) when noise traders (uninformed traders, or idiots as Krugman puts it) drive the price too high, and buying when noise traders panic and drive the price too low.
This is a very simple (=great) idea that was slightly complicated with the advert of behavioral economics, which proves that arbitrage is risky. If the noise traders goo too crazy it might be rational for an arbitrager to stay out of the market, because he doesn’t know whether the noise traders won’t go completely nuts driving the prices extremely low and making poor arbitrager loose money in the short run.
If we forget about behavioral economics for a while, we can clearly see that the more mistakes noise traders (usually individual investors) make, the more arbitrage opportunities arise and the more money will the arbitrage funds earn. In such a setting it would be optimal for arbitrage funds to spread false information. Issuing a warning that stock XY is overvalued (when it’s not), would cause the price of XY to plunge, the fund could buy it, wait till the price recovers, sell and pocket the difference. So it’s all about false information.
After reading this assesment of the economic situation of Europe, I feel that the MSN Investing page spreads exactly this kind of an information. THESE PEOPLE HAVE NO CLUE WHAT THEY ARE TALKING ABOUT and still individual investors in the US read it and presumably believe it. You can be a genius but how can you make reasonable investment decisions when the “finance gurus” feed you this BS? Noise trader needs not to be an idiot as Krugman says, he might only be misinformed or disinformed, which is sad given that we live in an informational age…
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To add a short note. If we realize that arbitrage is risky, it is actually in the best interest of the arbitrage funds to let everyone know that there is a mispricing, after they identify the mispricing at elast. After they identify it and buy (or short) the stock, they need other actors (even former noise traders) to help them “fight” the crazed noise traders who believe the stock is too expensive (or too cheap).





