In case anyone is interested, the end result seems to be, so far as I can tell, that NWBO is NOT listed on the Stuttgart exchange, it only trades there, in their version of over the counter in Stuttgart. So my broker is refusing to put my NWBO shares into my TFSA as a result. Does anyone know about the Stuttgart exchange and if they make this distinction between being listed on the exchange and only trading their "over the counter"?