What the heck are "Convertible Senior Debentures"?

Answer 1

The securities industry uses lots of jargon which means something to lawyers but little or nothing to the ordinary person. I can give you some textbook answers, which might or might not be applicable in your case.

In general a debenture is a fancy was to say debt. Some corporations do not "borrow money", instead they "issue debentures".

Senior means they take priority over junior. Priority how? You will have to look at specifics. Commonly senior means they earn interest first or the holders/investors get paid first in the event of bankruptcy and liquidation.

Convertible means they are convertible into something, usually common stock. How much stock is each debenture worth? Who decides when or if the debentures are converted? Again, you will have to look at specifics.

Simplified answer is that they are bonds (debt) which might be convertible to stock under certain circumstances.

Hope this was at least a little helpful.