Page 21 of Chapter 12 refers to an "ex-dividend stock". This is a share sold without the next dividend , ie, the new purchaser of the share does not receive the next dividend paid. An "ex-dividend bond" (or possibly an "ex-coupon bond") is the same thing for a bond, ie, it is a bond sold without the next coupon payment. So the new purchaser of the bond does not receive the next coupon paid.
