How to Build a Strong Strategic Rationale for Any M&A Deal

When an interviewer asks you to walk through an M&A deal, there's one section that quietly decides whether you sound like someone who understands deals or someone who memorized a headline. It's the strategic rationale: the part where you explain why the deal happened, from the buyer's side and the seller's side.

Most candidates get this backwards. They assume the rationale is the creative, high-difficulty part of the walkthrough, the place where they're expected to generate original insight on the spot. It isn't. Almost everything in a deal walkthrough is gleaned straight from the press release and the definitive proxy statement. The strategic rationale is a research-and-curation task before it is anything else. The skill is not inventing reasons. It's knowing where to find the real strategic logic, judging whether the deal you picked actually has any, and shaping two or three reasons per side into something tight and persuasive.

A full walkthrough usually runs in this order: deal background, business description and financial parameters, strategic rationale, your perspective, and deal outcome. The strategic rationale sits in the middle, but it's the hinge. Everything before it is setup. The section right after it, "Your Perspective," where you show how you actually think like a banker, is built directly on top of the rationale you just laid down. Build a weak rationale and there's nothing for your perspective to stand on. Build a strong one and the back half of your walkthrough almost writes itself.

This guide walks through the whole job: where the rationale lives, how to judge whether a deal can support one, how to structure both sides, and finally how to take an accurate rationale and make it genuinely strong.

Where the strategic rationale actually lives

There are three places to look, and you work them in order.

Start with the press release. When a deal is announced, the acquirer almost always issues a press release, and it usually contains at least a few sentences on why they're doing the deal. To find it, search:

If the press release is thin, go to the definitive proxy statement. This is the richer document, and it's where serious rationale tends to live. Search:

Inside the proxy, look for the section titled "Reasons for the Merger."

If neither the press release nor the proxy gives you enough, go dig in the financial press. SeekingAlpha is a good first stop, along with the WSJ, FT, NYT, and Bloomberg. Reporters and analysts will often articulate the strategic logic of a deal more sharply, and more honestly, than the companies do in their own filings.

That ordering matters because the quality of the source climbs as you go, but so does the effort. The press release is fast but sometimes promotional and shallow. The proxy is dense but authoritative. The news is where you find the independent, skeptical read. A strong rationale usually pulls from more than one of these.

Judge the source before you commit to the deal

Here's the mistake that's easy to make: you find "Reasons for the Merger" in the proxy, you copy it down, and you assume you're finished. But the proxy's stated reasons are not always the strategic rationale. Very often they're boilerplate about the M&A process itself.

Take L3Harris's acquisition of Aerojet Rocketdyne. If you pull the proxy statement and navigate to "Reasons for the Merger" on page 36, you'll find the stated reasons aren't that insightful. They relate more to the M&A process than to the strategic rationale: the board's deliberations, the fairness of the price, the alternatives that were considered, the mechanics of how the deal got done. All of that is real, but none of it tells you why putting these two businesses together creates value.

Now contrast that with AMD's merger with Xilinx. Pages 89 to 97 of that proxy are full of genuine strategic rationale, the kind of material you can lift straight into both the "Strategic Rationale" and "Your Perspective" sections of your walkthrough.

Learning to tell these two apart is the heart of building a strong rationale, so it's worth being precise about the difference:

• Process reasons answer "was this a sound transaction to approve?" They cover the negotiation, the price, the fairness opinion, the alternatives weighed. They're written for shareholders and lawyers.
• Strategic reasons answer "why are these two companies worth more together than apart?" They name a specific asset, capability, market, or customer base the buyer gains, and the specific payoff that follows.

You want the second kind. When a proxy only gives you the first kind, that's your signal to keep digging, or to pick a different deal.

That brings us to the bar. If you can't find at least four reasons for the acquisition, then unless there's a strong reason to stick with that specific deal, choose a different one. Four isn't a magic number, but it's a useful floor. A deal that yields only two or three findable reasons is telling you something: either the strategic logic is genuinely thin, or it's poorly documented. Either way, you'll struggle to sound convincing, and you'll have nothing left in reserve for the "Your Perspective" section or for follow-up questions. Four is the minimum to survive. The real target is higher, because the surplus is what you'll spend later.

Structure both sides: the buyer and the seller

A complete rationale has two halves: why the buyer did the deal, and why the seller did it. Cover both. Two to three reasons per party is sufficient.

To make this concrete, let's use a real deal: Boyd Gaming's acquisition of Pala Interactive. Before the rationale itself, you'd give your interviewer just enough setup for it to land. That setup is secondary to the rationale, so keep it brief.

First, the background. This is the answer one candidate gave in a Moelis interview, where Moelis advised the buyer:

If the seller were a public company, you'd also state the premium paid, using this shape:

Then a one to two sentence description of each business, enough to convey size, growth, and profitability:

With that context set, here's the strategic rationale itself, covering both sides:

Now look at how that's built, because the structure is the lesson. The first two paragraphs are the buyer's reasons; the third is the seller's. That's the buyer-and-seller split in action.

From accurate to strong: "Your Perspective"

Everything so far gets you an accurate rationale. What makes it strong is the section that comes next in the walkthrough, and it's the most important section of all: "Your Perspective."

The question you're really answering here is simple: "What do you think of this deal?" The interviewer is testing whether you can reason like a banker, whether you can take the facts and form a defensible view about whether the deal made sense. This is where you stop reciting and start thinking out loud.

Mechanically, it's closer to the strategic rationale than you'd expect. The main change is that you begin your sentences with "I think…" or "In my opinion…" and you bring your own judgment to bear on why the deal should or shouldn't have been pursued. The substance, though, comes from the same kind of reasons you've already been gathering, which is exactly why the earlier instruction to find more than you need pays off here.

Remember the bar: two to three reasons per side for the rationale, but find more if you can. This is where the surplus gets spent. The reasons you didn't use in the strategic rationale become the raw material for "Your Perspective." You're trying to convey that you've done real analysis on the deal, and sometimes you genuinely will have. Most often it's a blend: a few points you actually reasoned through, plus the ammunition you banked during research.

About that research. The process is unglamorous and it works:

spending 2 hours scrolling through Google compiling reasons beyond those I would use for "Strategic Rationale"

With enough digging you can assemble a long list, and then you just pick the ones that seem the most promising or complex. After all, you're trying to impress them, so lead with the reasons that show the most thinking.

One source most candidates never open is worth knowing about. The definitive proxy statement contains the actual analyses each financial advisor performed: the assumptions behind their DCF, if one was used, the comparable companies and precedent transactions they relied on, and the other work behind their valuation. This section is usually titled "Opinion of [Company X's] Financial Advisors," and it includes both the buyer's and the seller's advisors. If you want to sound like you've genuinely been in the weeds, this is where the specifics live.

Here's "Your Perspective" on the Boyd/Pala deal, built exactly this way:

That's the whole move, start to finish. Source the rationale rather than invent it. Judge whether the deal can actually support one. Lay out two to three real reasons for each side, every reason a clear cause linked to a clear effect. Then take the reasons you held in reserve, sharpen them with a mechanism and a number, and deliver them as your own considered view. Do that, and you won't just be describing a deal. You'll sound like someone who could have worked on it.

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