It must have been painfully awkward for the Commodity Futures Trading Commission (CFTC).

Last year, Deutsche Bank settled a civil suit involving blatant market rigging and turned over reams of information, including chat logs and voice recordings. The trove contained plenty of damning evidence which had gone overlooked by the CFTC.

CFTC investigators supposedly spent 5 years searching for illegal market manipulation, but somehow, managed to find nothing.

The cheating became hard to ignore after Deutsche Bank turned over voice recordings and 350,000 pages of documents which revealed bank trading desks being run like the back office of a crooked casino.

Here is one of the chat log gems between David Liew (Trader B) and an accomplice at UBS, where they coordinate trades and joke about it with a play on the timeless Ghostbusters song:

UBS [Trader A]: and if u have stops...

UBS [Trader A]: oh boy

Deutsche Bank [Trader B]: HAHA

Deutsche Bank [Trader B]: who ya gonna call!

Deutsche Bank [Trader B]: STOP BUSTERS

Deutsche Bank [Trader B]: deh deh deh deh dehdehdeh deh deh deh deh dehdehdeh

Deutsche Bank [Trader B]: haha16

This and records of many other similarly incriminating exchanges left CFTC officials little choice but to reverse themselves and finally take some action. On June 2nd, the Commission announced a settlement with a single trader named David Liew.