Disgruntled former Enron shareholders looking to recoup some of their losses have been dealt a major blow by the Supreme Court, which declined to review their lawsuit against the investment banks that helped Enron CFO Andrew Fastow enter into sham transactions designed to hide debt and inflate the company's profits.

The Supreme Court's decision not to hear the case is, frankly, insane. Major investment banks entered into deals with Enron that clearly served no economic purpose other than to inflate the company's financial statements.

For instance, some of the transactions involved things like selling a barge to a consortium of investors and then buying it back for more money during the next quarter. What could these sophisticated investment bankers possibly have thought was going on?

In effect, the investment banks served as maitre d's renting out hotel rooms in 15-minute slots to leggy blondes who signed with names like "Crystal Divinity" and men who signed "John Doe." And now they're trying to claim that they didn't know there was any kind of scheme.

These investment banks willingly helped Enron conspire to defraud investors, and now they're being shielded from civil liability for the scheme that they were an integral part of. That's wrong.