Looks like IB is $1.82 (0.90 + 0.90 + 0.02) per side for YM for unbundled if you don't hold overnight, with no volume requirement. Over 300 contracts per month, it drops $0.20 per side. Over 1000 contracts per month, it drops another $0.25 per side. Save another $0.60-0.80 per side by getting a CBOT membership (I don't remember which one).
IB's one way for ECBOT YM Unbundled (By volume) <=300 $2.12 <=1K $1.92 <=10K $1.57 <=20K $1.37 > 20K $1.17 Bundled $2.13 Seems competitive to me. Jack
In IB margin account, Can I buy OTCBB stock by margin? If possible, can I buy $3.1 OTCBB stock by margin ?