I didn't understand that article, probably because I'm unfamiliar with the author's other works. Is he proposing that a company be allowed to set rules regarding insider trading during the IPO? If so, I agree that in theory this would be efficient (or in the author's terminology, it would be acceptable from a consequentialist POV). But this is orthogonal to the issue. The people who want to ban insider trading would most argue that insider trading is inefficient, and therefore companies would choose not to issue stocks like this. And if they are right, we would still be in the same situation, it's just that instead of people violating a rule created by the government in order to maximize utility, they would be violating a contract created by the company in order to maximize the company's IPO price (which also happens to maximize utility).
Am I missing anything else? Did the author make a specific argument for why insider trading would prove to be efficient (i.e. why the effect on liquidity outweighed the increased information revelation?) I doubt it since the author's language suggest someone familiar with law and philosophy but not so much finance and econ.
The argument is that instead of having the government decide what's best, the company should decide (and it doesn't need to be during the IPO). Then, the so-called "free market" will decide whether it's good or bad. If they decide it's bad for companies, then companies won't allow it, because it will hurt their stock price. If they decide it's good, then companies will allow it.
Because obviously the market won't be completely free: companies deciding on their policy in the proposed regime would most certainly be influenced by factors beyond the question of whether it's good for their stock price.
Ok that's reasonable. I agree that in theory this argument makes sense. In practice I think the arguments that insider trading is inefficient are compelling enough (see https://news.ycombinator.com/item?id=10487779) that it's not worth pursuing this course.
Inefficient compared to what? The choice is not between "publicize the info" and "let insiders trade", its between insider trading and no insider trading, and the information stays private.
Inefficient compared to what? The choice is not between "publicize the info" and "let insiders trade", its between insider trading and no insider trading, and the information stays private.
You are implying that I don't realize that insider trading reveals extra information. But I have clearly stated in almost every post that insider trading would reveal additional information. There's no point continuing this discussion if I am responding to what you say but you're ignoring what I say. I'd ask you to keep an open mind and not assume that other people just need to be enlightened via terse replies.
>So (and again, a model is really needed to confirm this) public information is cheaper in terms of its impact on liquidity, than insider information. One thing I'm not certain of is whether many insiders competing to trade on the same information would be as good as public information
That sounded to me like you were against insider trading because it wasn't as efficient as public information. I don't get why that implies we shouldn't allow insider trading.
Your other post said that it necessarily harms someone, but I think that argument was successfully argued against in the link I posted above. Do you have a problem with that part of it?
Also, I would still like it being up to the company. If liquidity is important to them, and the experiment shows that allowing it leads to less liquidity, then eventually they'll stop it.
I don't think that market is inefficient enough to necessitate government action.
Am I missing anything else? Did the author make a specific argument for why insider trading would prove to be efficient (i.e. why the effect on liquidity outweighed the increased information revelation?) I doubt it since the author's language suggest someone familiar with law and philosophy but not so much finance and econ.