Rights Offering vs. Bonus Issue: Why Dilution Cuts One Way and Not the Other

Two Announcements, Two Opposite Reactions

A company announces a rights offering, and the stock often drops the next day. A different company announces a bonus issue, and the stock can jump. Both events add new shares to a company's capital structure, yet the market treats them almost like opposites. Stock Splits vs. Buybacks covered two events that adjust share count while leaving the company's actual value untouched. A capital increase is different: it genuinely changes the company's capital base, and depending on the method, existing shareholders can see their ownership stake meaningfully diluted. Understanding the mechanism behind each type explains why the market's first reaction differs so sharply — and why that first reaction isn't the whole story.

Rights Offering: New Shares, New Money From Outside

A rights offering (or new share issuance) is when a company issues new shares and sells them to investors in exchange for actual cash, raising capital without taking on debt. The catch is that the number of shares outstanding goes up while the company's near-term profit and assets don't — so earnings per share (EPS) and book value per share fall automatically simply because the same pie is now split into more pieces. This is dilution, and it's a real cost, not just an accounting footnote. The metrics covered in Financial Statement Basics — EPS, P/B — are exactly the "per-share" figures that move when the share count changes.

Rights offerings generally take one of three forms. A shareholder-priority offering gives existing shareholders first crack at buying new shares in proportion to what they already own. A general public offering sells new shares to the broader investing public. A third-party allotment issues shares to a specific investor or institution chosen by the company. The market usually reacts worst to third-party allotments: existing shareholders get diluted without even getting a chance to participate, and the deal can read as a sign the company can't raise the money through its own credit or through shareholders who understand the business — a red flag about how the funds will actually be used.

Bonus Issue: Moving Money the Company Already Has

A bonus issue (sometimes called a scrip issue) sounds similar but works completely differently. The company still issues new shares, but it hands them out to existing shareholders for free, in proportion to what they already hold — no cash changes hands. The source isn't fresh outside money; it's retained earnings or capital reserves the company has already accumulated on its balance sheet. In accounting terms, this is simply a transfer from a reserves account to the paid-in capital account. No cash leaves the company, and none comes in.

That's why the market usually reads a bonus issue as two things at once: a signal that the company's finances are healthy enough to fund it purely from retained earnings, and an expectation that a larger, more liquid float will improve trading activity and accessibility for smaller investors. But a bonus issue doesn't create real value any more than a stock split does — it just relabels one line item as another. The company's actual assets and earning power haven't grown by a cent.

Ex-Rights Pricing: The Math Behind the Automatic Adjustment

After the record date for either type of issuance, the share price automatically adjusts down — this is the ex-rights price. Just as with a stock split, more slices means each slice is smaller, and the total pie stays the same size. For a bonus issue, the math is simple: a $100 stock that hands out one bonus share for every share held (a 100% bonus issue) has a theoretical ex-rights price of $50.

A rights offering adds one more variable: the subscription price of the new shares. Say a $100 stock offers one new share for every 10 shares held, priced at $80. The theoretical ex-rights price is:

(old price × old shares + subscription price × new shares) ÷ (old shares + new shares)

Plugging in the numbers: ($100 × 10 + $80 × 1) ÷ 11 ≈ $98.18. Because the subscription price is usually set below the current market price, the ex-rights price generally lands below where the stock traded before the announcement. This figure is a theoretical benchmark based on the assumption that every share is subscribed and nothing else changes — not a guarantee of where the stock will actually trade once the market weighs in with its own supply and demand.

A Worked Example of Real Dilution

Assume a company earning $10 million with 10 million shares outstanding, and an investor holding 10,000 shares (0.1%).

	Before	After a 2M-share rights offering (investor doesn't subscribe)	After a 2M-share bonus issue (investor receives shares pro rata)
Shares outstanding	10M	12M	12M
Investor's shares	10,000	10,000	12,000
Investor's ownership	0.1%	~0.083%	0.1% (unchanged)
EPS	$1.00	~$0.83	~$0.83

EPS falls in both cases — more shares are splitting the same profit. But ownership only shrinks in the rights-offering scenario, and only because the investor didn't subscribe. A bonus issue distributes new shares to every shareholder automatically, so ownership percentage stays exactly where it was. In a rights offering, everyone else who subscribes is buying into the new shares being created; an investor who lets the right lapse is the only one not doing so, and that's what actually moves their ownership stake.

Subscription Rights and Unclaimed Shares

In a shareholder-priority rights offering, the right to buy new shares at the set price is called a subscription right. Shareholders typically have three options: subscribe and buy the new shares, sell the subscription right itself on the market for cash, or simply let it lapse. Letting it lapse means absorbing the dilution with nothing in return, so where subscription rights are tradable, selling them is usually the more rational choice over doing nothing.

Shares nobody subscribes to are called unclaimed or forfeited shares, and companies typically resell them through a public offering or have the underwriting bank absorb them. An unusually high forfeiture rate is itself a signal — it suggests the shareholders who know the company best weren't willing to put in more money, which the market often reads negatively.

Why the First Reaction Differs — and Why It Isn't the Final Word

The market's opposite gut reactions come down to what each event implies about why the company needed to act. A rights offering means the company needs fresh capital from outside — which could fund real growth like an acquisition or expansion, or it could mean existing operations aren't generating enough cash to cover debt or operating needs. The market tends to price in that uncertainty short-term, and real dilution adds a tangible cost on top of it.

A bonus issue implies the opposite: the company didn't need to borrow or bring in new investors at all, funding the move purely from what it already earned. That reads as a healthy-balance-sheet signal. But it's worth resisting the urge to treat "bonus issue" as automatically good news across the board. Because real company value hasn't changed, a bonus issue can also trigger short-term speculative buying around the lower per-share price that fades once the excitement cools — which is why many market professionals describe bonus issues as "short-term positive, long-term neutral." In both cases, the announcement itself isn't the conclusion — it's the starting point for asking what the company plans to do with the capital, or what its balance sheet actually looks like.

Takeaway

• Rights offering: new shares sold for real cash from investors. Creates genuine dilution, and the market's reaction depends heavily on who the shares are offered to.
• Bonus issue: existing retained earnings converted into new shares, distributed free to current shareholders. No new outside cash, and no real increase in company value.
• Ex-rights price: the automatic downward price adjustment after new shares are issued — a rights offering's calculation is more complex because it has to account for the subscription price.
• Subscription rights and forfeited shares: the priority right existing shareholders get to buy new shares, and what happens to shares nobody claims.
• Rights offerings tend to read as short-term bad news and bonus issues as short-term good news, but both are just the opening signal — what matters is the stated use of funds and the company's underlying financial health.

FAQ

If I don't participate in a rights offering, what happens to my existing shares?

Your existing shares don't disappear. But since total shares outstanding increases, your ownership percentage falls — and if you let your subscription right lapse instead of selling it, you get nothing in return for that dilution.

Do I owe tax on shares I receive from a bonus issue?

It depends on your country's tax rules, so there's no single answer. Check your local tax code or ask your broker — this article explains the mechanics, not tax treatment.

Can a company do a rights offering and a bonus issue together?

Yes, and it happens fairly often — a company raises capital through a rights offering and then announces a bonus issue shortly after. When that happens, it's worth evaluating the two separately: what the rights offering's real dilution and stated use of funds are, and how strong a health signal the bonus issue actually sends.

⚠️ This article is for informational purposes only and is not investment advice. You are solely responsible for your own investment decisions.