Well what I like to do is buy bonds and anything that has a Q associated with the trading symbol is a convertible bond by international trading rules and any company trading outside the geographical main office local is classified as a international company except in the North America free trade countries this does not apply.
So if a North American company trades in Germany it is under international rules but if it only trades in Canada or Mexico, and a few other central and South America Countries and those one will have to look up for them selves cause I don't remember them all at the moment will trade under SEC rules or IIROC rules in Canada or what ever country belongs to the North American free trade accord then the Q stands for a very different thing altogether then it does in international rules and that is not to say the other rules don't apply except to say if another entity trades international then it must follow international rules if the entity is registered in another country.
It is why it is so important to find were a entity is registered and if it is following international rules or geographical rules cause alot of times the debt will be held in North America were the equity is held in a foreign country under international rules so the Q would indicate a holding of a bond.