How Merger Reviews Move a Target Company's Share Price
Once a cash offer is announced, the target's price tends to settle a little under the offer and stay there. That gap is the market's running estimate of whether the deal will close.
Take a hypothetical cash takeover at 50 a share. The target jumps on the news, then settles around 47. The 3 between the two prices is the deal spread, and it is the market telling you, in a single number, how much it doubts that 50 will actually be paid.
Why the gap exists
Buying at 47 and collecting 50 at closing looks like free money. It is not free, because two things stand between the announcement and the payout.
The first is time. A deal can take many months to close, and money tied up in the target could have earned something elsewhere, so part of the spread is plain compensation for waiting.
The second is risk. Antitrust regulators may review the deal and can demand changes or try to block it; where the companies operate in several countries, more than one authority may need to agree. Target shareholders usually vote. Financing can fall through. Any of these can end the deal, and if it ends, the target’s price has no reason to stay near 50.
The arithmetic of the spread
The asymmetry is the whole point. The upside is capped at the offer. The downside is a fall back toward wherever the stock would trade alone, which is often far below the offer, and nobody knows that level in advance, so the 36 in the example is an assumption you would have to make for yourself, perhaps by looking at where the stock traded before the bid and how its sector has moved since.
How review news moves the price
The upside is fixed. So the target mostly moves on news about whether the deal will close, and when.
A regulator asking for more information widens the spread, because the review just got longer. So does a large shareholder coming out against the deal. A financing problem does the same. Clearance, a successful vote or a settlement with regulators narrows it. When a deal is abandoned, the target can gap straight down to its standalone value, which is one of the situations where a gap has no particular reason to fill, a point argued in gaps do not have to fill.
Exchanges sometimes halt trading around major deal news. The mechanics are in what happens when a stock you own is halted.
The spread can even turn negative. That happens when the market expects a higher bid.
Stock-for-stock deals
A stock deal pays in shares. There is no fixed price.
So the spread in a stock deal moves with the acquirer’s share price as well as with deal risk. Professional arbitrageurs who buy the target often sell the acquirer short to hold just the spread. Some deals mix cash and stock. Others fix the value within a range. The merger agreement sets the arithmetic.
What this means for you
Your best case is known. Your worst case is a guess. Size the position with the downside in mind, using your own estimate of the fallback price, and keep in mind that regulatory reviews follow published processes much like the rulemaking traced in how an SEC rule change reaches your account, while their outcomes and timing stay entirely with the regulators, so a spread is only ever a price on a probability.
Also asked
- What happens to my shares if the deal closes?
- In a cash deal your shares are canceled and the offer price per share is paid into your account. In a stock deal you receive shares of the acquirer according to the exchange ratio.
- Can the offer price go up after announcement?
- It can, if a rival bidder appears or shareholders push back. That possibility is one reason a spread can narrow or the target can trade above the offer.