Trading is a speculative practice, a bad behavior of private individuals in the moral and religious context.

Speculation is a practice that from a human perspective is negative, irrespective of the collateral effects on the market. 

Trading causes a dangerous addiction to money in the pursuit of profit, a condition that is contrary to religious principles.  
A great concern is the moral evaluation of the behavior of the individuals within the economic system; individual should avoid speculative forms morally reprehensible. The social and legal endorsement does not exempt each individual from moral responsibility."

http://www.oikonomia.it/index.php/it/oikonomia-2000/ottobre-2000/54-2000/ottobre-2000/160-il-documento-etica-e-finanza



"cause of this situation is found in our relationship with money, since we calmly accept its dominion over ourselves and our societies. The current financial crisis can make us overlook the fact that it originated in a profound human crisis: the denial of the primacy of the human person! We have created new idols. The worship of the ancient golden calf (cf. Ex 32:1-35) has returned in a new and ruthless guise in the idolatry of money and the dictatorship of an impersonal economy lacking a truly human purpose. The worldwide crisis affecting finance and the economy lays bare their imbalances and, above all, their lack of real concern for human beings; man is reduced to one of his needs alone: consumption."


 
 
  
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1Timothy 6:10 -- For the love of money is a root  of all kinds of evil. Some people,  eager for money, have wandered from their faith and pierced  themselves with many griefs.

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How to invest ethically

In order to maintain a personal correct behavior an individual should operate with a medium and long-term horizon, avoiding any types of modalities and instruments for the pursuit of short-term profit.


RELEVANT LINK
http://www.vatican.va/archive/ENG0015/_P8C.HTM



Since the completely safe asset does not exist, a person can never accumulate enough to feel totally safe. The search for such security is a chasing after the wind – we are never satiated, no matter how much we possess. It is wiser not to begin the pursuit (e.g. Ecclesiastes 5:10; 6:7).



See also:

Web site: tradingonline-a moral problem