The Securities and Exchange Commission today charged 18 individuals and entities for their roles in a fraudulent scheme in which dozens of online retail brokerage accounts were hacked and improperly used to purchase microcap stocks to manipulate the price and trading volume of those stocks. Those charged include Rahim Mohamed of Alberta, Canada, who is alleged to have coordinated the hacking attacks, and several others in and outside the U.S. who allegedly benefited from or participated in the scheme.