Let's say that a Canadian investor buys a Japanese corporate bond from a broker's stock. This bond is bought on the Primary market or the Secondary market.

What are the most likely things that will increase this investor's return over the course of the bond's holding period? Let's say the investor sells his bonds before they mature and uses some of the money to buy a $200 zero-coupon T-Bill with an 8-month maturity. 

If it was bought for $75.52, what is the effective annual rate (EAR)?