Coordinating with the goal of market manipulation (basically buy/sell/short/pump-and-dump/etc cartels or other) is illegal as far as I know. Hence why the guys

Coordinating with the goal of market manipulation (basically buy/sell/short/pump-and-dump/etc cartels or other) is illegal as far as I know. Hence why the guys who made a lot of money on the negative oil trades are staying very quiet.