Robinhood Markets, Inc. (HOOD) has received a notice from the Securities and Exchange Commission (SEC) that its crypto business — Robinhood Crypto — could face an enforcement action. The notice comes as a result of the violation of registrations as a securities broker and transfer agent.The regulator has argued that most tokens are subject to SEC rules. Thus, the platforms where they trade ought to be registered with the agency. The regulator relies on a test laid out in a 1946 Supreme Court case in order t ...