Hi, it is stated that the RegT maintenance rate is 25%. Yet, at the end of the day, the real margin requirement rate (RegT) is 50%, and not 25%. why is that? Here: " As governed by the Federal Reserve's Regulation T, when a trader buys on margin, key levels must be maintained throughout the life of the trade. First off, a broker cannot extend any credit to accounts with less than $2,000 in cash (or securities). Second, the initial margin of 50% is required for a trade to be entered. Finally, the maintenance margin says that an equity level of at least 25% must be maintained. The investor will be hit with a margin call if the value of securities falls below the maintenance margin."