Enron investors’ lawsuit, attempting to recoup losses from investment banks that did business with the defunct energy company, suffered a major setback when the United States Supreme Court refused to review a lower court’s ruling which dismissed this theory of liability. Notably, a week earlier, in a different, but similar action involving investors of Charter Communications, the Supreme Court ruled investors in that case did not have a right to sue outside entities that did business with Charter Communications because those investors did not rely on the deceptive acts of those entities.

http://www.nytimes.com/2008/01/23/business/23enron.html?_r=1&scp=2&sq=Enron&st=nyt&oref=slogin