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InvestingKlement on InvestingJoachim Klement2026-09-24

The companies buying up rivals deliver worse returns to shareholdersThe impact of acquisitions on stock returns

A study finds that well-managed firms that expand abroad through acquisitions trade at higher valuations but deliver lower share price returns — and that US acquirers shop most often in Britain.

The author picked up a paper about management quality and international expansion, and got tripped up by something else entirely.

Good management is not a good stock

The paper says firms run by better managers are more likely to go international, and the market pays up for them with higher multiples. Paying a high price means the actual return to shareholders is lower.

On average, acquisitions destroy value

The data sorts US companies into four groups: those that stay domestic, and those that go multinational without buying anyone, both deliver higher returns. Make acquisitions — at home or abroad — and average returns are worse. Share price reactions to deal announcements confirm it.

Purely domestic firms carry more risk: less diversified revenue, on average weaker management. The market compensates that risk with higher returns over the cycle. A small comfort for investors in UK domestic companies, which have done badly for years.

One more finding: when US companies go shopping abroad, British businesses are their prime target. No wonder the number of listed UK companies keeps shrinking.

Why it matters

When a deal is announced, the pop in the share price is often the market being polite rather than the market making a judgement. Once a capable management team has been priced at a premium, the new shareholder is left with thinner returns — so ask what the buyer paid for the privilege.

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