Why European equities trade at a persistent discount

The valuation gap between European and US equity indices is one of the most quoted facts in the market and one of the least decomposed. The standard explanation is sector mix: the US index is weighted toward software and semiconductors, Europe toward banks, energy and industrials, and software deserves a higher multiple. That explanation is true, and it is incomplete.

Separating the mix effect from the rest

The test is straightforward in principle. Reweight the European index to the US sector composition, or compare like-for-like sectors directly, and see how much of the gap survives. Both approaches leave a residual.

Comparing within sectors is the more informative version, because it removes the argument entirely: an industrial listed in Frankfurt and one listed in Chicago are being valued by the same global investors against the same end-markets.

What the residual might be paying for

Several candidates, in rough order of how much evidence supports them:

• Lower expected growth, not from the sector but from the end-market: more domestic revenue exposure, in economies growing more slowly.
• Lower and more volatile margins, driven by labour cost structures that flex less through a cycle.
• Fragmented markets, where a leading position in one country does not convert into pricing power across the region.
• A thinner domestic buyer base, with household savings concentrated in deposits rather than equities.

The first two are fundamental and should be reflected in price. The last is a flow argument, and flow arguments have a poor record as valuation anchors.

Why it matters for individual companies

For a bottom-up investor the index-level gap is close to useless on its own. What it does provide is a prior: a European business being valued in line with its domestic index is not obviously cheap, because the index carries a discount for reasons that may or may not apply to that company.

The question worth asking of any specific holding is which of the reasons above actually bind. A European business with global revenue, structural pricing power and margins that hold through a downturn is not exposed to most of them — and if it trades at the regional discount anyway, that is the interesting case.