Quote from 8_Ball:
I think if/when the risk-based margin goes into effect the verticals are going to gain a big advantage. All that margin interest building up is going to make it very difficult to make money on all but the most volatile stocks.
It's going to be like swimming against a riptide.
I think even with reg-T margin, vertical still has an advantage over collar. Should check it with OptionCoach, the vertical expert.

