Corporate Bond Trading If I Buy A Bond Trading At 80 That Matures In 1 Year , Can I Yield 20 % Plus The Coupon Rate ?

If I buy a bond trading at 80 that matures in 1 year , can I yield 20 % plus the coupon rate ? - corporate bond trading

I know very little about the trading of bonds and began to investigate, in two weeks.

I saw the links etrade company with a rating of A-, A or AA, that this scenario. Some of them have a negative attitude because of the current economic situation. This is a fixed return of 25% is the risk of failure? Is this a normal situation, these reductions to yours?