The consumer sectors that once formed the backbone of the S&P 500 have shrunk to their smallest combined share of the index in roughly three decades. Consumer Discretionary and Consumer Staples together now account for approximately 13.9% of total S&P 500 market capitalization, their lowest combined weight since the 1990s.

The breakdown, as of mid-2026, shows Consumer Discretionary at about 9.3% of the index and Consumer Staples at roughly 4.6%, according to S&P Dow Jones Indices data from late June. Information Technology, by comparison, commands around 38% of the index on its own — nearly three times the combined size of both consumer sectors.

A Three-Decade Reshuffling

The erosion of the consumer sectors' standing unfolded gradually. Consumer Staples alone represented roughly 13% of the index in 2008 — approximately the same share that both consumer sectors now hold combined.

The sector map itself has been redrawn along the way. Both groups are defined under the Global Industry Classification Standard (GICS), jointly maintained by S&P Dow Jones Indices and MSCI, and the framework was restructured in March 2023 to shift major retailers such as Target and Dollar General from Consumer Staples into Consumer Discretionary — a change that relocated some of the most recognizable household names between the two sectors.

At various points during 2026, technology, communication services, and consumer discretionary collectively exceeded 58% of the S&P 500. Defensive sectors face a parallel squeeze: consumer staples, healthcare, and utilities are collectively approaching an all-time low of about 15%.

Why Consumer Stocks Keep Losing Ground

The mechanics behind the shrinkage are straightforward. S&P 500 sector weights are computed from float-adjusted market capitalization, so when technology stocks appreciate rapidly while consumer stocks stagnate or lag, relative sector weights shift even if no investor sells a single share of Procter & Gamble. Performance data through 2026 confirms this dynamic: many consumer discretionary and staples names have underperformed or traded sideways while their technology counterparts have surged.

Index composition reinforces the picture: Consumer Discretionary today houses mega-cap names such as Amazon and Tesla, while Consumer Staples is anchored by companies like Walmart and Costco.

Several analysts have drawn comparisons to earlier eras of sector dominance. In the late 1980s, energy stocks held an outsized share of the index before ceding ground to technology in the decade that followed.

What Concentration Risk Looks Like in Practice

For portfolio managers, the figures present a tangible allocation challenge. Passive index funds, by definition, mirror these sector weights. An investor holding a standard S&P 500 fund now has nearly 38 cents of every dollar allocated to information technology and less than 5 cents in consumer staples — a markedly different risk profile than the same fund offered a decade ago.

The scale of that exposure is broad: trillions of dollars in index funds and exchange-traded funds track the S&P 500, so these sector weights flow into ordinary retirement portfolios without any active decision by the account holder. Anyone tracking the trend can watch S&P Dow Jones Indices' regularly updated sector weight data, along with the annual GICS structure review, where any future shifts in sector boundaries would first surface.