Today the U.S. Supreme Court effectively killed off any chance of a $40 billion class-action lawsuit against the investment firms that did business with Enron. The suit charged that the Wall Street firms were complicit in Enron’s massive corporate fraud fiasco. The Supreme Court, however, just ruled on a similar case last week and found that “third parties – vendors, contractors and consultants such as banks, accountants or attorneys – can’t be sued over corporate fraud unless investors relied on them when making their investing decisions.”