True. And the most common lack is : .... Common sense (selling empty stocks? hello?? How would that be possible in real life?)
Now one of the issues on the market for the moment is short selling.
The fluctuations in the Euro zone are part due to short selling. Someone sells things thinking the market will go down and at that moment does not own the thing they sell yet.
On itself it is just a normal broker thing, you are looking for something, I sell it to you, but it is someone else (a broker) that delivers, then only I go and find it (you do not have to look, negotiate, etc...) and give it back to the broker at a certain time against a certain cost. If I got a profit good for me, otherwise bad for me.
Normally this is a good thing, creating a liquidity in the market and an easier way to do transactions. The issue is that it can be a self fulfilling prophecy by creating a panic that will make the value go down = I sell sell sell, even if I have no stock and people think the confidence is lost in the market, sell as well and the price goes down. I buy when the price is down and made a good profit, the company has liquidity issues with the clients that go out since the market does not believe in it and the company goes bust. Me as short seller needs to find a new pigeon to get my bonus.
There the ethical point comes in. Beginning of the year I got an investment tip, food prices will go up. I do believe it is unethical to contribute with investment products to famine (not our moderator, but the thing that really kills people) so I did not react, but not everyone is that way.
Deregulation allows this, the short seller gets richer and the employees of the company lose their job, the investor in food options wins and third world countries need help to solve the famine.
So deregulation yes on responsibility, but the products available in the market should contribute to stability. Best would be that investors do not follow the short sellers, but share price = emotion, emotion, emotion.
Calculated investments are that way now, we calculate value on future cash flows and the future is what you believe = emotion.