Mutual funds are required to impose Codes of Ethics on many of their employees. Did this requirement make a difference? After all, similar Codes proliferate in many other financial and business corporations! 4 with fairly miserable results. In fact, the temptations facing employees and managers of many business corporations that published self-imposed Codes are relatively weaker than the temptations facing employees and managers of mutual funds. Yet as compared to mutual funds, these business companies have failed to prevent insider-trading! I believe that regulated mutual funds are less prone to insider-trading than non-regulated funds and traders because their Codes of Ethics have introduced enforcement mechanisms and have influenced thei...