When trading in a Reg-T account at Interactive Brokers (IBKR), it is important to be aware of several key constraints that are designed to manage risk and ensure regulatory compliance. These constraints include:
- Regulation T (Reg-T) Compliance: All positions in your account must comply with Reg-T requirement rules. Reg-T is a set of rules established by the Federal Reserve Board that governs the extension of credit by brokers to customers for the purchase of securities. The US Federal Reserve's Reg T margin requirement is 50% and limits potential overnight leverage for open stock positions to 2:1.
- Special Memorandum Account (SMA) Requirement: The SMA value must be zero or positive daily, 10 minutes before the market close at 15:50 EST. The SMA is a separate account maintained by brokers to track the amount of credit available to a customer for further purchases of securities that can potentially be carried through the Reg T overnight period from 15:50 EST to 17:20 EST.
- Gross Position Value (GPV) Check: This check is applied at the time of trade and limits the overall position size in your account. The GPV is the total market value of all long positions plus the absolute value of all short positions in your account.
- Available Funds Calculation: The funds available for trading in a Reg-T account are calculated as follows:
- Available Funds = the lesser of (current Equity with Loan Value - total Initial Margin OR end of the Previous Day's Equity with Loan Value - total Initial Margin)
- This calculation determines how much buying power you have for new trades in a Reg T margin type account.
These constraints are crucial for maintaining the integrity of your trading account and ensuring compliance with regulatory requirements. They help manage risk by limiting leverage and ensuring that you have sufficient equity to cover your positions.
Note
- These rules and constraints may be subject to change. For the most up-to-date and detailed information on account constraints and requirements, always refer to the latest official documentation provided by IBKR.