What Is a Convertible Bond (CB) — Between Bond and Stock
A bond that can turn into a stock? A convertible bond (CB) is a product with two faces: 'a bond in normal times, a stock when the price rises.'
What Is a Convertible Bond
A convertible bond (CB) is a bond that comes with the right to convert into shares of the issuing company under set conditions.
In other words, it is a hybrid security that combines a bond (fixed interest and repayment at maturity) with an option called a 'stock conversion right.'
The investor receives interest as a bond in normal times, and if the company's share price rises enough, can convert the bond into stock at a pre-set conversion ratio to aim for the gain from the price rise.
The conversion ratio sets how many shares one bond can be converted into. For example, 5:1 converts one bond into 5 shares.
A convertible bond is a hybrid of 'a bond + a stock conversion right (an equity option),' can be converted into stock according to the conversion ratio, and has a lower coupon rate than an ordinary corporate bond — this is the standard definition from StoneX, Financial Edge, and others.
Low Interest and Its Price
A convertible bond's coupon rate is usually lower than that of the same company's ordinary corporate bond.
The reason is simple. In exchange for receiving the added value of 'the right to convert into stock,' the investor concedes a little interest. For the issuing company, it is attractive because it can raise funds at low interest.
Looking at the payoff structure, if the share price rises, thanks to the conversion right you enjoy an upside gain like a stock, and if the price languishes, you don't convert and receive interest and principal as a bond.
In other words, it is an asymmetric structure close to 'bond on the downside (principal, interest), stock on the upside (conversion gain).'
See the Risks Behind the Advantages
It's easy to mistake a convertible bond for giving 'both the stability of a bond and the upside of a stock,' but the risks are clear too.
(1) Credit risk: it is ultimately a bond, so if the issuing company deteriorates, you may not receive interest or principal. (2) Low interest: if the share price never rises, you may be worse off than an ordinary bond, having received only a low coupon. (3) Conversion/dilution: if large-scale conversion occurs, existing shareholders' stakes are diluted and it can weigh on the share price.
Also, complex clauses such as early redemption and refixing (adjustment of the conversion price) are often attached, so it can be hard for an individual to fully understand the terms.
Preguntas frecuentes
Q. Is a convertible bond safe because it's a bond?
It has the character of a bond (interest, repayment at maturity) but does not guarantee 'safety.' If the issuing company deteriorates there is credit risk, and if the share price doesn't rise you may receive only low interest and be worse off than an ordinary bond. The explanation that 'it gives both the stability of a bond and the upside of a stock' can easily miss that, depending on the situation, the gain on either side may not be large.
Q. Why do companies issue convertible bonds?
Because they can raise funds at lower interest than an ordinary corporate bond. They give investors the appeal of a 'stock conversion right' in exchange for reducing the interest burden. That said, if large-scale conversion occurs later, existing shareholders' stakes are diluted, so there is a two-sidedness from the company's and shareholders' perspective.
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