The S&P 500 closed at a new high yesterday. The All US Industries Momentum Heat Map tells a different story. Of the 40 US industries scored every trading day, only four sit above 70 on the ImGeld Industry Rating. The other 36 sit below — half of those below 50.

This is not a market in expansion. This is a market in concentration.

What the data shows

An industry score above 70 on the ImGeld Industry Rating means the underlying companies are showing both fundamental expansion and price momentum confirmation. It is the threshold where leadership becomes structural rather than cosmetic.

Three months ago, twelve industries cleared that bar. Today, four. The narrowing has been continuous — not a sharp inflection, a steady drainage.

  • Semiconductors at 82, up from 74 in early February
  • Aerospace & Defense at 76, broadly stable
  • Banks — Major at 71, recovering from 64 in mid-March
  • Insurance — Property at 71, flat for six weeks

Everything else has slid. The most pronounced drops have come from former leaders — homebuilders, regional banks, transports — that held above 70 throughout most of the prior cycle and now sit between 38 and 52.

Signal

A market where 4 of 40 industries hold above 70 is not a broad rally. It is structural concentration. Index level can rise on flows into a small surface while the underlying distribution thins.

What this means for portfolio construction

Concentrated leadership has two structural consequences for a Long-Short portfolio. First, the universe of legitimate Long candidates shrinks. The framework requires Longs inside expanding industries — fewer expanding industries, fewer qualifying names. Second, position sizing has to compress. Volatility tends to expand inside narrow leadership regimes because flows are forced into a smaller surface.

The natural response is not to chase the leaders. The natural response is to tighten the criteria for Long candidates and widen the search for Shorts inside the 36 industries that no longer score above the median.

Rallies on three or four industries are not rallies. They are squeezes. The framework treats them as such.
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The All US Industries Momentum Heat Map ranks every US industry by ImGeld Industry Rating, delivered as an Excel file before the US open. The same dataset behind this analysis.

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Reading the rotation

Climbers vs. faders

An industry climbing from 35 to 55 is structurally more interesting than one sitting at 78 for the third week running. The first is rotation in motion. The second is consensus already priced.

The Heat Map exposes both. Today's biggest climbers — Insurance — Property, Banks — Major — were ranked outside the top 15 a month ago. Today's biggest faders — Solar, REIT — Residential — were inside the top 10 in February.

What the framework records, not predicts

The framework does not predict which industry rotates next. It records where capital is moving while it is moving, so the position-level work happens with current information rather than yesterday's narrative.

What the framework does next

Inside the four industries above 70, the Long shortlist gets shorter and the bar for entry gets higher. Inside the bottom 15, the Short shortlist gets longer and stocks that were marginal a month ago become viable. Both sides of the book get rebalanced — that is the whole point of running a Long-Short portfolio rather than a directional one.

None of this requires a market call. It requires reading the distribution every morning and adjusting the book accordingly. Process. Not noise.