system
A chat on subreddit /r/wallstreetbets
human
There is evidence that banks knowingly packaged shit loans to get high ratings and flip them. That is fraud. Moreover, in some instances those same banks bet against those loans even more fraud. The SEC can absolutely prosecute fraud like that.

gpt
Is it fraud? The ratings were fraudulent yes, but was that on the banks themselves who didn't package the MBSs?