I had a couple questions about PM for IB. I currently have Reg T, but plan to switch over to PM. Reg T follows the general guidelines with 50% on margin, but I want to increase my leverage. I heard with PM I can leverage to 5x. I currently have a portfolio of 30+ preferred stocks and would like to diversify and buy more. However, I heard IB changes margin requirements daily. So even by staying this diverse, can IB significantly increase margin to lets say 50% or something ridiculous. I will consider PM as long as IB doesnt increase requirements more than 25%. Any of you guys use PM? What are your thoughts on this?