Martin Arthur Armstrong is an American self-taught economic forecaster and convicted felon who spent 11 years in jail for cheating investors out of $700 million and hiding $15 million in assets from regulators. Wikipedia
This is the charging document in the $700 million case:
https://www.justice.gov/archive/dag/cftf/chargingdocs/armstrongsuper.pdf
An AI response might list Armstrong along with Bernie Madoff.
“Armstrong started Armstrong Economics in 2007 while he was still in prison. Inspired by letters he was receiving, Armstrong began producing research reports. He relied mainly on the Financial Times for information.”
https://www.desmog.com/martin-armstrong/