What it means
When a company floats shares or issues bonds, it sets a number of units and a price, then invites investors to apply. If total applications add up to less than the units on offer, the issue is undersubscribed.
The subscription ratio, applications divided by units offered, shows how far short it is. What happens next depends on how the deal is structured.
In a firm commitment underwriting, the underwriters (the banks arranging the sale) agree to buy any leftover units themselves, so the issuer still gets its money but the banks carry the risk. In a best-efforts deal, the banks only try to sell and the issuer may raise less than planned or cancel the offer.
An undersubscribed issue is often read as a negative signal. Investors may take it as a sign that the price is too high, the business is not convincing or the market mood is poor.
Shares that start trading after a weak book-build often open below the issue price. Issuers have several options when demand is thin.
They can cut the price, reduce the number of units offered, extend the offer period, widen marketing or postpone the deal. Many offers also state a minimum level of subscription, below which the issue lapses and money is returned to applicants.
Context matters, though. Government bond auctions, rights issues to existing shareholders and private placements can all be undersubscribed for reasons that have little to do with quality, such as bad timing, competing deals or a wider market sell-off.
Pricing method influences how often an offer is undersubscribed. In a book-build, the banks gather indications of interest before fixing the price, so a deal is rarely launched without enough demand.
Fixed-price offers and retail offers are more exposed because the price is set before anyone has committed.
In practice
Real-world examples.
Example
A regional airline offers 20,000,000 new shares to the public during a weak travel season. Investors apply for only 15,000,000, so the underwriters take up the remaining 5,000,000 and the airline's share price slips on its first trading day. Analysts note that the airline may need to raise any further capital through debt.
Example
A city council auctions $200,000,000 of bonds, but bids add up to only $170,000,000 because rival issuers launched on the same day. The council postpones part of the sale and returns later at a slightly higher interest rate.
Example
A biotech company makes a rights issue to its existing shareholders, offering one new share for every five held. Many holders decline to take up their rights, leaving the offer 80% subscribed and the company needing a standby placement with a fund. Because the shortfall is 20% of the issue, the board has to choose between raising less money and cutting the price.
Formula
Calculation
Subscription ratio = Units applied for / Units offered
Shortfall = Units offered - Units applied for
A company offers 10,000,000 shares at $5 each, aiming to raise $50,000,000.
Applications total 7,500,000 shares.
Subscription ratio = 7,500,000 / 10,000,000 = 0.75, or 75%
Shortfall = 10,000,000 - 7,500,000 = 2,500,000 shares
Money raised from applications = 7,500,000 x $5 = $37,500,000, so the funding gap is $50,000,000 - $37,500,000 = $12,500,000. In a firm commitment deal the underwriters would have to buy the 2,500,000 unsold shares for $12,500,000.
A price cut has a cost too: if the issuer lowers the price to $4.50 to attract buyers, the same 10,000,000 shares would raise only 10,000,000 x $4.50 = $45,000,000, which is $5,000,000 less than the original $50,000,000 target.Case study
Seen in the real world.
Lumen Pathway Systems is an illustrative, fictional software firm that planned a $30,000,000 flotation of 3,000,000 shares at $10 each. In the two weeks of marketing, global markets fell sharply and the order book closed with applications for only 2,100,000 shares.
The company had a best-efforts agreement with its banks, so nobody was obliged to buy the missing 900,000 shares. After talks, management cut the price to $9, reduced the deal to 2,400,000 shares and raised $21,600,000, which was enough to fund its core product plan but not the planned acquisition.
The illustrative outcome shows the trade-off: the company still listed, but it paid for the weak demand with a lower price, a smaller raise and a cancelled growth project. Investors later described the episode as a lesson in timing, because the shares traded above $9 once the wider market recovered.
Watch out
Common mistakes.
- Assuming an undersubscribed offer always fails, when underwriters or a lower price can still complete the deal.
- Reading the subscription ratio as the same thing as the issuer's success, ignoring the price and the quality of investors who took up shares.
- Confusing undersubscribed with underwritten; an underwritten issue can still be undersubscribed.
Questions
People also ask.
What does it mean if an IPO is undersubscribed?
It means investors applied for fewer shares than were offered, which usually points to weak demand at the proposed price.
Who bears the loss if an issue is undersubscribed?
In a firm commitment deal the underwriters hold the unsold units, whereas in a best-efforts deal the issuer simply raises less money.
How is it different from oversubscribed?
Oversubscribed means applications exceed the units on offer, so allocations are scaled back, while undersubscribed means there are not enough applications to take all the units.
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