Yellow Debentures safest bet YLO.db.a debentures are the safest way to play this right now. These debentures are trading at 32 cents on the dollar. This translates to a 33% annual compounded return to maturity on 2017. They rank ahead of the common and preferred shares in the event of bankruptcy. The bonus is that if they are bought out, they are bought out at $101 regardless of the takeout price.