The U.S. Supreme Court today handed business a huge victory by making it more difficult for investors to file fraud lawsuits.

By an 8-to-1 vote, the justices ruled that plaintifs must show that executives knew they were engaged in wrongdoing. This will give companies another way win early dismissal of these suits without paying huge legal fees.

Though I hate crooked CEOs as much as the next person, I think the court made the right decision. Investors shouldn't be able to run to the court house every time a company's stock unexpectedly falls. Fear of these lawsuits has caused some companies to communicate as little as possible with investors.

The people who made out biggest in these cases were the law firms such as the class action kings at Milberg Weiss & Bershad, which was indicted last year, along with some of its attorneys, for allegedly paying kickbacks to clients involved in some cases.

Last month, The Wall Street Journal (subscription required) reported that the firm's David Bershad was in talks that may lead to a guilty plea to the charges. Another former partner, Steven Schulman, was indicted along with Bershad. Melvyn Weiss, the head of the firm, and former partner William Lerach have also been investigated by prosecutors though formal charges haven't been filed against either of them.