---
title: "S&P 500 concentration peaks as yields hit multi-year highs"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/286950173.md"
description: "Nvidia and Apple now account for over 15% of the S&P 500, reaching levels not seen since the dot-com bubble. The 30-year Treasury yield has risen to 5.20%, a 19-year high, as markets prepare for ongoing Fed restrictions due to persistent inflation. A BofA survey indicates a record equity overweight and low cash levels, suggesting a risk of profit-taking in early June."
datetime: "2026-05-19T17:39:18.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/286950173.md)
  - [en](https://longbridge.com/en/news/286950173.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/286950173.md)
---

# S&P 500 concentration peaks as yields hit multi-year highs

Record stock concentration: Nvidia and Apple now make up over 15% of the S&P 500, surpassing historical peaks seen during the dot-com bubble. Yields climb sharply: The 30-year Treasury yield hit 5.20%, a 19-year high, as markets brace for prolonged restrictive Fed policy amid sticky inflation. Correction risk ahead: BofA’s survey shows record equity overweight and low cash levels, signaling potential for profit-taking in early June.

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