What it means
When one company buys another, it must pay in something: cash, shares or a mixture. The all-cash all-stock offer lays both on the table and lets each shareholder pick.
The mechanics set an exchange ratio and a cash price. Shareholders electing stock receive acquirer shares at the stated ratio, while those electing cash receive the fixed amount.
The acquirer caps the total cash and stock pools, so popular elections are usually prorated and the final mix is settled after the offer closes. Each currency tells a story.
Cash says the acquirer thinks its shares are dear or its target cheap, while stock says it wants partners rather than sellers, or that it lacks the cash. Tax drives the split as well, since cash is typically a taxable sale immediately while stock can defer the gain in many jurisdictions.
Control and feasibility follow the currency. A stock deal makes target shareholders owners of the combined firm, diluting the acquirer's existing holders, while cash concentrates the new empire in fewer hands.
Cash deals need money or borrowing capacity, and heavily levered buyers pay in paper whether they like it or not, while issuing new shares at scale needs authority and sometimes shareholder votes. Market moves reprice stock offers daily, because a bid in shares floats with the acquirer's price and the target's board must weigh the paper's quality as well as the ratio.
Collars can stabilise the exchange by keeping floating ratios within bands between announcement and closing. Arbitrageurs crowd these offers, narrowing the gap between offer value and market price, and their elections can shape the final mix.
For target shareholders, the decision framework is simple: take cash if you doubt the combination or need certainty, and take stock if you believe in it and can defer the tax. The election is also a referendum on the deal, since the cash-stock split is the market's vote on whether the combination is believed.
Hostile versions raise the stakes, because the offer goes over the target board's head and each side campaigns for the election that serves it.
In practice
Real-world examples.
Example
A target shareholder with 1,000 shares is offered $24 cash per share or 1.6 acquirer shares per share, with the acquirer trading at $15. Electing cash brings $24,000 with certainty, while electing stock gives 1,600 acquirer shares, also worth $24,000 at the current price. She chooses cash because she needs the money within the year and doubts the acquirer's share price will hold.
Example
A cash-heavy offer with a $500 million cash pool draws elections for $650 million of cash. Each cash elector receives roughly 77% of the elected cash, with the balance paid in acquirer shares at the stated ratio. Holders who elected stock keep their full allocation, so the proration falls entirely on the cash electors.
Example
A stock-heavy election leaves former target holders with 18% of the combined group. The acquirer's existing shareholders keep the other 82% and carry most of the synergy risk, which is the price of conserving cash. Former target holders who chose stock now own a minority stake in a firm they no longer run.
Formula
Calculation
Stock value per target share = acquirer share price x exchange ratio. With the acquirer at $15 and a ratio of 1.6, each target share is worth $15 x 1.6 = $24 in paper, matching the $24 cash alternative. Proration changes the mix: if the cash pool covers only 60% of elected cash, a cash-electing holder receives $24 x 0.6 = $14.40 in cash, plus the remaining 0.4 x 1.6 = 0.64 acquirer shares, worth 0.64 x $15 = $9.60, so the total still comes to $24.Case study
Seen in the real world.
Fictional example: Halden Materials, a fictional acquirer, offered a regional rival's holders cash or shares. Sixty percent elected cash, straining the capped pool, while the founders took stock and joined the board. Two years later the stock election had outperformed the cash by 45 percent as synergies landed, and the founders' paper funded the next acquisition. The lesson is that the election prices belief, and those closest to the business's future are the ones who should think hardest before selling it.
Halden's offer carried a walk-away clause, allowing the buyer to withdraw on a material fall in the target's earnings before closing, so holders elected in the shadow of that condition. The cash leg also depended on a bridge loan that was not yet signed, a reminder that a cash offer is only as firm as the buyer's financing. The target's founders, small business sellers accepting shares in the buyer, modelled their stock election under a normal performance case as well as under the synergy story. Sharing stock means sharing the upside of promised synergies, and those synergies may or may not arrive, so the normal case was the one that mattered most to them.
Watch out
Common mistakes.
- Choosing cash or stock without checking your own tax position.
- Valuing stock offers at announcement prices months before closing.
- Ignoring proration risk when everyone wants the same election.
Questions
People also ask.
Which is better, cash or stock?
Cash for certainty and taxable-now simplicity; stock for participation and possible tax deferral.
What is proration?
Scaling back oversubscribed elections so the total cash and stock pools fit the offer's caps.
Why do acquirers prefer stock?
It conserves cash, shares the deal's risk, and keeps target shareholders invested in success.
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