A convertible bond combines a debt obligation with a contractual route into equity or an equity-linked settlement. It can connect an issuer's funding needs with an investor's interest in future share-price growth. The real decision is how the instrument distributes cash requirements, ownership changes and downside risk across different outcomes.
In this perspective
The conversion option has economic value
For a conventional holder-option convertible, the investor receives debt claims and the right to convert under specified conditions. That right can be valuable, so the issuer may obtain a lower cash coupon than it would on otherwise comparable straight debt. The economic comparison must include the equity option given away, transaction expenses and any separate hedging arrangement. A small coupon does not make the financing free.
Terms differ materially. Mandatory conversion, issuer calls, investor repayment rights and restrictions on when conversion is available can reshape the outcome. A public-company convertible bond also differs from an early-stage convertible note that may convert at a later funding round using a valuation cap or discount. Begin with the actual instrument, rather than a generic description of convertibles.
Make the conversion arithmetic tangible
Consider a simplified fixed-price example: shares trade at €20 and a €1,000 bond has a €25 conversion price. The initial conversion premium over that reference share price is 25%, and the conversion ratio is 40 shares per bond. At a €30 share price, those shares are worth €1,200. This is conversion value only; the bond's market price also reflects remaining interest, credit risk, time and its detailed terms.
Suppose a €10 million issue converts entirely into shares at the same €25 price. It creates 400,000 shares. If 2 million shares existed beforehand, former shareholders collectively own about 83.3% of the 2.4 million shares afterwards. This illustrates ownership dilution, not a forecast of earnings per share or shareholder wealth. It excludes adjustments, interest, costs and any other securities.
Settlement changes the funding problem
Some instruments settle in shares, some in cash and some through a combination; the issuer's discretion is defined by the documents. Share settlement can increase shares outstanding. Cash settlement can preserve share count while creating a substantial cash requirement. Combined settlement may repay principal in cash and satisfy value above principal in shares, but that is one possible design rather than a universal rule.
The board should therefore compare cash and share-count outcomes across several share prices and conversion dates. Check the observation period used to calculate settlement, treatment of accrued interest and whether a change of control accelerates repayment or adjusts conversion terms. Do not assume that a higher share price automatically eliminates the need to find cash.
Test the weak-share-price case first
If voluntary conversion is unattractive and no other relevant provision applies, the debt generally remains payable according to its terms. The issuer may face a maturity precisely when its share price and financing options are weaker. The investor remains exposed to issuer default; a contractual principal amount is not a guarantee of recovery. Security and ranking still matter even when the instrument has equity potential.
Review conversion-price adjustments carefully. A fixed conversion price, subject to customary adjustments, creates a different exposure from a formula linked to a falling future share price. A floating formula can require progressively more shares and materially amplify dilution. Model explicit downside cases and identify any effective floor, cap or shareholder approval requirement instead of relying on an initial headline premium.
Understand who holds the exposure
One investor may want long-term participation in the company; another may hold the bond while hedging some share-price exposure. Those positions can lead to different trading behaviour and demands on stock borrowing. For the issuer, understanding potential investor strategies helps frame execution and shareholder communications. It does not reveal any particular investor's intention or predict the share price.
Issuer hedges, such as capped calls, need to be assessed separately from the bond. They can change net dilution or cash outcomes within defined limits, while adding costs, documentation and counterparty risk. We compare strategic financing options and coordinate cash-flow and ownership scenarios as part of preparation. Instrument design, distribution, legal documentation, tax and accounting require the relevant specialists and authorised providers.
Sources and further reading
Reviewed 2026-10-12. Details refer to the dates stated. Rules, terms and market conditions may change.
