Microsoft’s Entertainment President, Bach, Sold Stock as Xbox Problems Mounted

[sinha]

http://en.wikipedia.org/wiki/Insider_trading

I found this interesting:


Arguments for legalizing insider trading

Some economists and legal scholars (e.g. Henry Manne, Milton Friedman, Thomas Sowell, Daniel Fischel, Frank H. Easterbrook) argue that laws making insider trading illegal should be revoked. They claim that insider trading based on material nonpublic information benefits investors, in general, by more quickly introducing new information into the market.

Milton Friedman, laureate of the Nobel Memorial Prize in Economics, said: "You want more insider trading, not less. You want to give the people most likely to have knowledge about deficiencies of the company an incentive to make the public aware of that." Friedman did not believe that the trader should be required to make his trade known to the public, because the buying or selling pressure itself is information for the market.

Other critics argue that insider trading is a victimless act: A willing buyer and a willing seller agree to trade property which the seller rightfully owns, with no prior contract (according to this view) having been made between the parties to refrain from trading if there is asymmetric information.

Legalization advocates also question why activity that is similar to insider trading is legal in other markets, such as real estate, but not in the stock market. For example, if a geologist knows there is a high likelihood of the discovery of petroleum under Farmer Smith's land, he may be entitled to make Smith an offer for the land, and buy it, without first telling Farmer Smith of the geological data. Of course there are also circumstances when the geologist could not legally buy the land without disclosing the information, e.g. when he had been hired by Farmer Smith to assess the geology of the farm.

Advocates of legalization make free speech arguments. Punishment for communicating about a development pertinent to the next day's stock price might seem to be an act of censorship.