The Other 493.

A tape this narrow rarely stays narrow. What Friday's selloff tells us, and what an open strait would unlock.

The S&P 500 closed Friday at 7,408.50, down 1.24% on the day. Ten of eleven sectors finished in the red. The only one that didn't was energy — up 1.6%, as the Brent complex marked another inch higher on the same Hormuz overhang that has now been the dominant macro variable for ten weeks.

On the surface, a one-day drawdown after a strong run isn't worth writing about. Look one layer down and the composition is the story. Intel was off six percent. Micron, six-and-a-half. AMD, five-and-three-quarters. Nvidia, four-and-a-half. The selling was concentrated, precise, and exactly in the names that have been carrying the index. That isn't broad de-risking. That is a crowded trade exhaling.

01 / CompositionHow narrow is narrow.

Market breadth — the share of stocks participating in an advance — has now fallen to its second-weakest reading since the dot-com bubble. The index sits at all-time highs. The median S&P constituent does not. That divergence is rare. It has historically resolved one of two ways: either the index gives back to meet the median, or the median catches up to the index. The path it chooses depends almost entirely on what happens to long rates.

The most cited statistic of the cycle is concentration. Nvidia alone is now roughly eight percent of the S&P 500 — a single-stock weight last seen in the Cisco-IBM-Microsoft era. A handful of semiconductor and AI-infrastructure names — Nvidia, Micron, AMD, Broadcom, Marvell — have done a disproportionate share of the index's heavy lifting through 2026, while the other 493 names have, in aggregate, gone sideways. We have no quarrel with the underlying earnings power. We have a quarrel with what the market is paying for that earnings power, and with the position sizes implied by ETF and systematic flows that have to keep buying these names at any price.

The index is at a high because eight or ten stocks are. Replace those with their five-year medians and the S&P would be flat for the year. That isn't a market. That is a basket trade with a benchmark stapled to it.

02 / The macro hingeWhy this resolves through oil.

The transmission mechanism most participants underweight is the one running through energy. Brent has been bid for ten weeks on the assumption that the Strait of Hormuz remains practically closed — 1,550 vessels stranded, traffic at a tenth of normal, Goldman's base case of Brent above $100 for the remainder of 2026 if the disruption persists another month. That oil bid is doing real work in the inflation prints, and through them, in the long end of the curve.

Friday's tape rhymes with this. Yields rose. Tech sold off. The names that suffered most were the longest-duration earnings streams in the index. Energy held green because the same impulse that hurt them helped it. That is the textbook regime. It is also, we'd argue, late in its run.

We do not have an edge in geopolitics. We will not pretend to. But we observe two things. First, the regime has already telegraphed how it resolves: brief reopening announcements have moved oil eleven percent intraday on multiple occasions. The market is primed. Second, the longer the strait remains closed, the more economic damage accrues to the parties keeping it closed — and the deeper the eventual reset when it is restored, partially or fully. We are not buying because Hormuz must reopen. We are buying because the implied payoff if it does, against position sizes that have not been adjusted for that scenario, is too asymmetric to ignore.

03 / The asymmetryWhy the move would be broad.

If oil resolves lower, the chain is mechanical. Inflation expectations re-rate. Long yields come in. The dollar follows. Every part of the market that has been penalised by high real rates — and that is nearly every part of the market other than the AI complex — gets a tailwind. Rate-sensitive value catches a bid. Small caps, which have been priced as if the financing window will never reopen, get re-rated. Financials see the curve unkink. Industrials and materials, already cheap, see input costs ease. Dividend payers — utilities, staples, REITs — return to being something other than bond proxies.

The semiconductor complex, by contrast, does not need lower rates. It is being held aloft by something else entirely — capex commitments, hyperscaler order books, and the marginal flow of every passive dollar entering the index. It can rally with the rest of the market, but it doesn't need to, and a broad rotation might pull capital out of it. We expect the next leg, when it comes, to be a tape where the S&P moves up and the AI names are not the reason. That is the inverse of every weekly note written in the last twelve months.

This is the kind of setup we built the fund for. The crowded long is identifiable. The forgotten longs are identifiable. The catalyst is plausible but not certain. The downside, if we are early or wrong, is measured — left-behind quality at trough multiples does not have far to fall. The upside, if the regime breaks, is meaningful and broad.

04 / PositioningWhat we are doing.

We are not making a heroic call. We are adjusting weights.

• Shorting. Opening selective short positions in the most crowded names across semiconductors and AI infrastructure. The earnings power is real; the positioning is not, and we expect a meaningful drawdown in this cohort over the coming months as breadth widens and the passive bid loses its status as marginal price-setter. Sized as a tactical short — not a structural call against the secular thesis.
• Adding to broad-mid-cap quality with operating-margin durability and balance-sheet headroom, particularly in financials, industrials, and selective consumer cyclicals that have de-rated meaningfully into this tape.
• Holding a measured energy position. We are not playing the headline. We are positioned for the volatility around it.
• Carrying ample cash. The point of dry powder is to deploy it into dislocation. A pullback that takes the AI complex meaningfully lower is one we would meet with capital, not commentary.

The next five trading days may be loud. They may also be the start of something quieter and more durable — a tape where the index keeps going up, but does so by carrying the names it has been ignoring. That is the move we are positioned for. We will be wrong about the timing. We do not intend to be wrong about the direction.

This note reflects the views of AMA Invest as of the publication date and is provided for informational purposes only. It does not constitute an offer to sell or a solicitation of an offer to buy any security or investment product, nor investment advice. Statements regarding markets, positioning, and outlook are the manager's opinions and are subject to change without notice. Forward-looking statements involve risk and uncertainty; actual results may differ materially. Past performance is not indicative of future results. Investments in the fund are available only to eligible investors who meet applicable suitability and accreditation requirements under relevant jurisdictions. All investments involve risk, including the possible loss of principal.