You are correct. FINRA Rule 4210 defines the requirements for margin. Robinhood's FAQ on the subject was ostensibly written by someone who doesn't understand t

You are correct. FINRA Rule 4210 defines the requirements for margin. Robinhood's FAQ on the subject was ostensibly written by someone who doesn't understand that "margin" is a word with specific meaning in the context of a highly regulated brokerage business. It's an account where you take risk with only partial equity, with the institution putting up the balance. From FINRA: "The term 'margin' means the amount of equity to be maintained on a security position held or carried in an account." Elsewhere on Robinhood's site, I was happy to find some acknowledgment of the regulatory requirements: "To purchase a security on margin, we require that you have at least $2,000 or 100 percent of the security’s purchase price (whichever value is less) deposited into your account. This is called the "margin minimum." If you are designated a pattern day trader, you must have $25,000 in portfolio value (minus any cryptocurrency positions) before you continue day trading. Note: If you are borrowing on margin and fall under $2k portfolio value, you are at risk of a margin call and potential liquidation" People here are downvoting you because they don't know the rules and they believe Robinhood's website when it says that Robinhood Instant is margin.