We always knew that the financial markets were rigged, but this is getting ridiculous.

It is now being alleged that 20 major banks have been systematically fixing global interest rates for years. Barclays has already been fined hundreds of millions of dollars for manipulating Libor (the London Inter Bank Offered Rate). But Barclays says that a whole bunch of other banks were doing this too.

This is shaping up to be the biggest financial scandal in history, and criminal investigations have been launched on both sides of the Atlantic.

What those investigations are likely to uncover could shake the financial markets to their very core.

In the end, this scandal could absolutely devastate confidence in the global financial system and it could potentially bring down a number of major global banks. We have never seen anything quite like this before.