Their margin rates. I'm not interested in derivatives (don't trust myself not to flub it), I prefer old fashioned margin. I understand it better and it works fo

Their margin rates. I'm not interested in derivatives (don't trust myself not to flub it), I prefer old fashioned margin. I understand it better and it works for me. IB prices their rates with a spread based on the fed funds rate (I think), rather than just grabbing some random number out of the sky. This stock market upheaval some other brokers are trying to have competitive margin rates, but in the past downturn when I was broker shopping, IB was blowing others away with ~2% rates while everyone was at ~7%. IB is very much targeting advanced consumers all the way up to small funds and trading shops, so you can do a lot on their platform if you're interested.