For a publicly traded MLP should I be checking the "All of my investment activity is at risk" box? I would like Schedule E income/loss to be shown as "Passive".

It seems that unless the At Risk box is checked Turbo Tax will show the Schedule E income/loss as "Nonpassive" which does not appear to be appropriate for owning publicly traded MLPs. On the other hand I have seen comments that if you are an LP your investment is not "at risk".