Since 30% is the margin rate, TD Direct Investing is lending the account holder 70% of the trade value. Maximum loan value is 1,000 shares x $50 x 70% = 

Full Risk Disclosure: Futures and forex trading contains substantial risk and is not for every investor. An investor could potentially lose all or more than the initial investment. Risk capital is money that can be lost without jeopardizing ones’ financial security or life style. Futures are financial contracts obligating the buyer to purchase an asset or the seller to sell an asset, such as a physical commodity or a financial instrument , at a predetermined future date