Investment fraud sadly is a common occurrence and thrives during a bull market. In 1997 alone, 5,448 investors were to file complaints against their brokers with the National Assn of Securities Dealers while 5,997 filed arbitration claims. This excludes those who simply attributed their experience to the risk of investing rather than fraud. Doctors are especially vulnerable to the glib tongues of unscrupulous brokers. They can take steps to retrieve losses in cases involving churning, unauthorized trades, misrepresentation and unsuitable investments.