Can someone please give me a quick explanation on trading bonds. I understand that if OCR rise and the bond was paying a lower original IR then the bond will decrease in price so the yield increases towards what the market and vice versa fo OCR decreases.. obviously related to.more variables like risk ect of underlying bond.

My question is more around when you buy them say on direct broking why you trade with a selected rate vs an actual $value per bond? When you make a purchase say 6.5% x 5000 for example how many underlying bonds do you actually get? Or is it an actual value? What's comes through on your shareholder statement?

Thanks in advance and sorry for the rather basic questions