Greetings, I have a problem with the Margin Requirements in my Portfolio Margin Account on IB (IB Ireland, as I live in Europe). Problem: the indicated Margin Requirements differ always from the actual Margin which is slightly higher than the RegT Margin. It's generally said that with Portfolio Margin you have about 6.67 times more buying power. In the account window in TWS the buying power is indeed exactely 6.67 times my cash amount. So far so good. I know of course that in reality it depends on the volatility of the stock. But if I look at stocks with low volatility and high market cap and check the Margin Requirements in the preview window, it is generally 15-17%. But oddly enough this Margin Requirement (see small popup-Window, bottom right in the screenshot) is never applied in the actual traid. In the example screenshot the actual Maintenance Margin is more than 27%. I have checked this with numerous stocks. The figures displayed in the small popup-Window that appears when clicking on Margin Requirement is always much lower than the actual Margin, which almost always slightly exceeds the RegT-Maintenance Margin of 25%. Does anyone have an idea what's going wrong here?