This article is educational content explaining how a general market mechanism works, not investment advice, and it does not describe any specific current event, company, or security.
A shareholder can watch their percentage stake in a company shrink within a matter of weeks without ever placing a sell order. That outcome is not an error by the registrar or a quirk of the system. On the Nigerian Exchange (NGX), it is the predictable result of a mechanism called a rights issue, and it turns on a short, often overlooked trading window: the period when the “rights” themselves, not the underlying shares, change hands on the exchange floor.
How the Subscription Price Gets Set Below Market
When a listed company needs fresh capital, whether to fund expansion, strengthen its balance sheet, or meet a regulatory requirement, it can raise that capital from its existing shareholders through a rights issue rather than offering new shares to the wider public. The offer gives each shareholder the right to buy additional shares in proportion to what they already hold, commonly expressed as a ratio such as one new share for every four already owned, at a subscription price set below the shares’ prevailing market price.
That discount is not simply a reward for participating. It reflects the arithmetic of dilution: once the new shares are issued, the total share count rises, which pulls the share price toward a blended “theoretical ex-rights price” that sits between the old market price and the lower subscription price. Pricing the offer below market compensates existing holders for that dilution and gives them a concrete reason to take up their entitlement rather than ignore it. The size of the discount differs from one offer to the next, depending on how much capital is being raised, and the offer itself must comply with rules set by the Securities and Exchange Commission and the NGX before it can proceed.
Why Rights Trade Separately During the Acceptance Period
Nigerian rights issues are typically structured as renounceable, which means a shareholder is not restricted to a simple choice between subscribing in full or doing nothing. The rights themselves, the entitlement to buy shares at the discounted subscription price, are issued as a distinct, temporary security with their own trading code, and they can be bought and sold on the NGX for a defined acceptance period, usually a few weeks, before the offer closes.
This separate market serves two kinds of shareholders. Those who want to participate but cannot fund their entire entitlement can sell a portion of their rights and use the proceeds to help pay for the remainder. Those who do not want to increase their holding at all can sell their whole allocation to another investor, who then assumes the right to subscribe in their place. In both cases the rights carry real, tradable value, because whoever holds them can buy shares below the market price, and that value is priced continuously on the exchange for as long as the acceptance window remains open.
What Happens When Rights Are Left to Lapse
The one path that carries a clear cost is inaction. A shareholder who neither exercises their rights nor sells them before the deadline simply forfeits them. Lapsed rights are typically pooled and sold by the company or its registrar on the shareholder’s behalf, with any surplus remitted afterward; this route is generally the least favorable of the available options, since it depends on finding a buyer and gives the original holder no say in the outcome.
The dilution that follows is simple arithmetic, not penalty. If a company issues new shares equal to a given percentage of its existing share count and a shareholder takes up none of their entitlement, the number of shares that shareholder holds stays the same, but total shares in issue increase, so proportional ownership falls accordingly. A shareholder who subscribes in full keeps their percentage stake intact. One who sells their rights converts that stake into cash instead of shares, but is compensated for the dilution. Only the shareholder who lets rights lapse without selling absorbs the dilution with nothing to offset it. That is why exchange rules require companies to publicize acceptance deadlines well in advance, and why the rights-trading window, not just the headline subscription price, is the part of a rights issue that determines the outcome for any individual shareholder.
