When it comes to market manipulation it's very hard to say what's legal and what's not, that's why investment banks have huge compliance departments who have im

When it comes to market manipulation it's very hard to say what's legal and what's not, that's why investment banks have huge compliance departments who have immense expertise in these areas. It's unlikely Porsche had that kind of legal advice so could have accidently broken the law. The brokerage/advisory firms they used could also be liable, as regulated firms have an obligation to inform the regulator if they believe a client is commiting market manipulation.