# S&P 500 concentration hits 35% in tech, equal‑weight ETF gains

**Published:** 2026-06-23T17:23:24.008Z  
**Topic:** S P 500  
**Sentiment:** neutral  
**Publisher:** TrendWatcher — https://www.trendwatcher.in/article/cdce92c9-4ef6-40d0-8484-f2c6f7dbc97c

S&P 500 tech weighting climbs to 35% as big‑tech stocks drive 85% of recent gains; equal‑weight ETF offers lower P/E and diversification.

The S&P 500’s tech weighting has risen to **35%**, meaning a traditional cap‑weighted ETF now places a large bet on a handful of megacap names such as Nvidia, Apple and Microsoft【1】. This concentration has sparked a surge in interest for the equal‑weight version, which trades up 0.6% while the cap‑weighted index slipped 0.1% on the same day【2】.

| At a glance | |
|---|---|
| Tech weight in S&P 500 | 35% (up from prior months)【1】 |
| Big‑Tech contribution to S&P advance (May) | 85% of gain【2】 |
| Equal‑weight ETF (RSP) price move | +0.6% on Monday【2】 |
| Forward P/E of RSP | 17, about 15% lower than cap‑weighted S&P【1】 |

## Rising concentration and market breadth

The surge in AI‑related earnings and a strong first‑quarter earnings season have propelled the “Magnificent Seven” and other semiconductor names to dominate the index. Data shows the bottom 480 stocks in the S&P 500 collectively lost market value this year through mid‑May, while the top gainers—led by Alphabet, Nvidia and Apple—added the bulk of the index’s rise【2】. The divergence between index direction and breadth is at a record pace not seen since 1928, according to market‑breadth charts cited by analysts【2】.

## Equal‑weight ETF as a diversification alternative

The Invesco S&P 500 Equal‑Weight ETF (RSP) holds the same 500 constituents but gives each an equal share, reducing tech’s sector weight to 16% and balancing exposure across industrials, financials and healthcare【1】. Its forward P/E of 17 is roughly 15% cheaper than the cap‑weighted S&P, offering a modest valuation edge【1】. The macro backdrop—ongoing geopolitical tension, sticky inflation that could push rates to 4%, and a labor market showing signs of stagnation—adds weight to a defensive tilt, according to the same source【1】.

## What to watch
- **U.S. inflation data** (next CPI release) – could confirm or challenge the 4% inflation scenario referenced in the macro outlook.
- **Federal Reserve policy meeting** – any shift in rate‑cut expectations would affect both cap‑weighted and equal‑weight equities.
- **Tech earnings season** – quarterly results from the “Magnificent Seven” will test whether the concentration risk translates into broader market volatility.

The growing tech concentration means a traditional S&P 500 ETF is increasingly a bet on a few megacap stocks, while the equal‑weight alternative offers a lower‑priced, more balanced exposure. Whether investors shift toward diversification will hinge on upcoming inflation numbers and the Fed’s rate path.

## Sources
1. The Motley Fool — [A different way to invest in the S&P 500](https://www.fool.com/investing/2026/06/03/best-sp-500-etf-to-invest-500-right-now-rsp/)
2. Morningstar — [The S&P 500 and most of its stocks are heading in opposite directions at a record pace. What investors should know.](https://www.morningstar.com/news/marketwatch/20260518369/the-sp-500-and-most-of-its-stocks-are-heading-in-opposite-directions-at-a-record-pace-what-investors-should-know)
3. Investopedia — [How to Start Investing in the S&P 500 Today](https://www.investopedia.com/ask/answers/how-can-i-buy-sp-500-fund/)

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Cite as: TrendWatcher, "S&P 500 concentration hits 35% in tech, equal‑weight ETF gains", https://www.trendwatcher.in/article/cdce92c9-4ef6-40d0-8484-f2c6f7dbc97c