PROVEN AND DOCUMENTED: Joe Weisenthal is drunken with his own manipulation paranoia.

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Joe is going off the deep end. Market noises are now interpreted as the intergalactic battle between the pro-HCR and the anti-HCR, who are both seeking to manipulate the InTrade prediction markets. No evidence whatsoever is displayed.

Prediction Market Chart

P.S: I am not picking on Joe, who is a good web curator, and a nice chap. Just disagree with him (and Andrew Golberg) that prediction market journalism is easy to do. Good prediction market journalism is very hard to do. Requires scoops and pertinent analysis. Scrapping exchange probabilities and aggregating it with re-written news is not enough.

ADDENDUM

More info on health care reform on Memeorandum.

Previously: Insider trading in the InTrade prediction market on health care reform?

OSCARS 2010: Did Justin Wolfers brag too much and too loudly? – [RELATIVE ACCURACY DEPARTMENT]

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Jason (a Freakonomics reader):

You are giving yourself WAY too much credit. Siskel and Ebert successfully predict these awards 100% year after year. This isn’t a difficult thing to predict. Predicting something like the NCAA tourney, that would be an accomplishment, but if you look at rankings and your prediction market, you will fail just as much as the average bracket.
— Jason

Health care reform is down to 47% at InTrade. -> Toss a coin, it will get you the same.

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So much for the &#8220-insider trading&#8221- who signaled the certainty of the adoption of the new health care reform bill. Joe Weisenthal swallowed InTrade CEO&#8217-s marketing bait.

Prediction Market Chart

More on Memeorandum.

Previously: Insider trading in the InTrade prediction market on health care reform?

Business Insider readers are rather skeptical of the InTrade insider trading story.

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Many are critical. Read.

Plus, the event derivative is back to 55% [UPDATE: 47%] &#8212-slightly above tossing a coin.

Prediction Market Chart

Here&#8217-s The Hill on the prospect for the bill. &#8211- More on Memeorandum.

Previously: Insider trading in the InTrade prediction market on health care reform?

Insider trading in the InTrade prediction market on health care reform?

InTrade CEO John Delaney:

&#8230-it is a reasonably active market but atypically a lot of the trade is coming from the DC area when normally we might see trade coming from all the major urban areas.

Prediction Market Chart

ADDENDUM: For your information, in Great Britain, sporting insiders (such as athletes or jockeys) who trade on betting exchanges (such as BetFair) are actively monitored.

Paul Krugmans excellent definition of the prediction markets

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Paul Krugman:

Betting markets don’t have any mystical power, but they do summarize conventional wisdom pretty well- […]

E-mail confidentially to tell me the names of the economists who over-hype the prediction markets.