VIX peaked three weeks ago at ~85 and has since dropped by 50%. Yet IB is continuously increasing their margin requirements as VIX is dropping. Every day is higher than the last. As I check it this morning, Portfolio Margin is barely better than reg T. I'm scared that it can just keep going higher and higher, because why not? Their system appears to have no sense to it. I might actually end up downgrading to a reg T account at some point if that gives more margin I always believed IB's risk aversion was a good thing that protected customers like me, and people who complained about margin were just whiners who were taking too much risk anyways (naked option selling, etc). Seeing how their system behaves now, I no longer believe this. This is, by far, the most profitable trading environment I've ever seen in my career. It might be once in a lifetime. And IB is hamstringing us with this goofy margin system. I am making a week worth of profits every day, but I could be making more than 2x that with a proper 15% PM account. (This is straight up equity trading by the way, cash neutral portfolios, no options.) I hope IB gets their act together, but I am actively looking into switching brokers at this point.