Sector Equal Weight Is the Smarter Concentration Play

The S&P 500's greatest risk may be its own success: concentration in the top names has grown heavy enough that the standard diversification advice—move from a cap-weighted index to an equal-weight one—now carries dangers of its own. On a recent Crossing the Themes podcast, Danny Schwab, senior investment strategy advisor at SS&C ALPS Advisors, and Paul Baiocchi, head of fund sales & strategy, laid out a sector-level version of that trade, one more likely to gain traction with advisors than the familiar stock-level equal-weight funds.

Their argument starts with a constraint most advisors know intimately: significant changes for clients with low-cost-basis holdings raise tax and operational issues, pushing advisors toward familiar solutions, and the obvious one is an equal-weight S&P 500 fund. But equal-weighting individual stocks, for all the work it does on concentration at the very top, reshapes the whole risk profile of the portfolio—more exposure to smaller companies and higher-beta names, more volatility as the portfolio works its way down the market-cap spectrum.

The sector-level approach sidesteps that trade-off. EQL, the fund Schwab described, equal-weights sectors while keeping the stocks inside each sector market-cap weighted, so a sector's weight is a decision rather than a byproduct of its constituents' market value. As of August 28, the top five sectors run from energy at 9.90% down to materials at 9.02%, with healthcare, financials, and information technology in between at 9.74%, 9.66%, and 9.50%—an even spread that is a deliberate departure from a cap-weighted index, where sector weights simply reflect the market value of the constituents.

By adding to sectors that carry smaller weights in a traditional cap-weighted index and trimming the ones that dominate it, the sector-level approach changes the mix without chasing down the market-cap spectrum—a careful, contained repositioning rather than a wholesale reconstruction. Schwab framed EQL as a complement to a plain S&P 500 ETF, something that lets an advisor reshape the overall sector profile without overhauling the core allocation.

The distinction between a modifier and a replacement is the crux. A stock-level equal-weight fund is a replacement: it buys the same stocks in equal amounts and effectively says the market's size and beta distribution is wrong. A sector-level fund is a modifier, accepting the market's internal logic about which companies within a sector are worth owning while making a deliberate bet on which sectors deserve a bigger share of the portfolio. For an advisor who cannot realize gains on a low-basis portfolio, the modifier is the only realistic path.

The tax cost of realizing gains, stacked on the operational burden of rebalancing a large number of positions, is enough to make many advisors hesitate—and a single-fund solution scales precisely because nobody has to sell out of the core. EQL's appeal is that it can be bought in one transaction and held as a sleeve, making the concentration fix available to clients who would never sign off on a full reconstruction.

Diversification, though, is not a single act, a binary switch from concentrated to diversified; it is a sequence of decisions about which new exposures to introduce and in what order. As this publication argued in its review of QINT, the construction of an index is itself becoming the active choice inside a passive wrapper, and the sector-level equal-weight design is exhibit A. A cap-weighted index accepts the market's sector distribution wholesale; a stock-level equal-weight index makes a broad and blunt bet on size and beta; the sector-level approach makes a precise, explicit bet on sector mix while preserving market-cap discipline inside each sector.

The case for the sector approach is especially strong at a moment when the ETF shelf is overflowing with me-too products. With the launch machine outrunning the shelf, as this publication's August flows review noted, the funds that survive are the ones with a clear purpose and a distribution story—and EQL's purpose is now sharper than it might have been in a less concentrated market, because it directly answers how to add diversification without losing the tax advantages of a long-held position.

None of this means the sector-level trade is without risk: an equal-weight sector fund will lag a cap-weighted index when the biggest sectors are winning, and in this market that has been a painful trade. It is a deliberate tilt, not a hedge, and it should be expected to underperform in the near term if mega-cap technology keeps running. But the honest construction of that tilt is why the sector approach is worth a serious look—it meets the client where they are, with an embedded gain and a reluctance to trigger a tax event, and it offers a way to address concentration without treating the portfolio like a sand table.

Ultimately, the sector-level equal-weight approach is the one advisors are likely to actually deploy, because it best respects the constraints that matter in practice. The stock-level version is the cleaner theoretical answer to concentration; the sector-level version is the practical one. Watch whether low-basis clients start adding EQL as a sleeve—if they do, the sector-level trade will have made it from podcast to portfolio.