What it means
The mechanics run through an exchange ratio, meaning the number of acquirer shares handed over for each target share. If that ratio is fixed, the value of the offer rises and falls with the acquirer's share price, which is why targets often push for a collar that caps the swing in either direction.
Buyers choose stock when cash is scarce, when the deal is large relative to their balance sheet, or when they believe their own shares are richly priced. Paying with expensive paper is cheaper than paying with cash the company would otherwise have to borrow.
The cost is dilution, because existing shareholders end up owning a smaller share of a bigger company. Whether that is a good trade depends on whether the earnings added per new share exceed the earnings per share the buyer already had, the test analysts call an accretion or dilution analysis.
All stock deals also share the risk of the plan working. If the promised savings never appear, target shareholders suffer alongside the buyer, whereas in a cash deal they have already banked their money and walked away.
Regulators and tax rules push in the same direction for some sellers. A share-for-share exchange can often be rolled over without an immediate tax charge, so founders and long-term holders sometimes prefer stock even when a cash bid looks larger on paper.
In practice
Real-world examples.
Example
Two mid-sized regional banks merge in an all stock deal because neither has spare cash and both boards want the combined shareholder base to stay invested through a three-year integration.
Example
A listed medical device maker acquires a loss-making research firm entirely in shares. Paying in stock avoids draining the cash the buyer needs for clinical trials and keeps the target's scientists motivated, since their payout now depends on the combined share price.
Example
A target's board rejects a fixed-ratio all stock bid after the acquirer's shares slide 18% between announcement and the shareholder vote. The offer that was worth $52 a share on announcement is now worth about $43, so the board demands a collar before recommending it.
Formula
Calculation
Exchange ratio = Offer price per target share / Acquirer share price, and New shares issued = Target shares outstanding x Exchange ratio.
Northwind Systems trades at $40 a share with 50,000,000 shares outstanding and earns $200,000,000, so its earnings per share are $200,000,000 / 50,000,000 = $4.00. It bids for Calder Analytics, which has 10,000,000 shares, at $60 a share, valuing the target at 10,000,000 x $60 = $600,000,000. The exchange ratio is $60 / $40 = 1.5 Northwind shares per Calder share, so Northwind issues 10,000,000 x 1.5 = 15,000,000 new shares and finishes with 50,000,000 + 15,000,000 = 65,000,000 shares, of which Calder holders own 15,000,000 / 65,000,000 = 23.1%. Combined earnings of $200,000,000 + $40,000,000 = $240,000,000 give earnings per share of $240,000,000 / 65,000,000 = $3.69, so the deal dilutes Northwind holders by $4.00 - $3.69 = $0.31 a share, or 7.8%. To hold earnings per share at $4.00 the combined company would need 65,000,000 x $4.00 = $260,000,000 of earnings, which means after-tax cost savings of $260,000,000 - $240,000,000 = $20,000,000.Case study
Seen in the real world.
The following is an illustrative and fictional example. Brantfield Logistics, trading at $28, offered 1.25 of its shares for each share of Orrin Freight, valuing Orrin at $35 a share against a market price of $29 before the announcement.
Orrin's board liked the 21% premium but worried about the fixed ratio, because Brantfield's shares had swung by more than 20% twice in the previous year. They negotiated a collar so that the ratio would adjust if Brantfield traded outside a band of $25 to $31, protecting Orrin holders from a fall while capping their gain.
By completion Brantfield was trading at $24.50, below the band, so the ratio moved to 1.43 shares and Orrin holders still received close to $35 of value. The illustrative point is that in an all stock offer the headline price is a moving number, and the collar is what turns it into something closer to a promise.
Watch out
Common mistakes.
- Treating the announced offer value as fixed, when in a fixed-ratio all stock deal it moves every day with the acquirer's share price.
- Judging a stock deal only on the premium, while ignoring how much of the combined company the target's shareholders will actually own afterwards.
- Assuming dilution automatically means a bad deal, when a deal can dilute earnings per share in year one and still create value if the savings arrive.
Questions
People also ask.
Why would a buyer pay in stock rather than cash?
Because it conserves cash, avoids new borrowing, keeps the target's owners invested in the outcome, and is especially attractive when the buyer's own shares are trading at a high multiple.
What is an exchange ratio collar?
It is an agreed band for the acquirer's share price within which the ratio stays fixed, with the ratio adjusting outside the band so the value delivered stays closer to the announced figure.
Do target shareholders pay tax on an all stock offer?
In many jurisdictions a qualifying share-for-share exchange defers the tax until the new shares are sold, which is one of the main attractions for long-term holders.
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