---
title: S&P 500 profit margins spiked to 16.9% in Q2, which is by far their highest level in history.
description: "“Profit margins are probably the most mean-reverting series in finance, and if profit margins don't mean revert, then something has gone badly wrong with capitalism. If high profits don't attract competition, there's something wrong with the system.” - Jeremy Grantham\n\nSource: Charlie Bilello\n@charliebilello"
---

[Syz The Moment](https://blog.syzgroup.com/syz-the-moment)

# [S&P 500 profit margins spiked to 16.9% in Q2, which is by far their highest level in history.](https://blog.syzgroup.com/syz-the-moment/sp-500-profit-margins-spiked-to-16.9-in-q2-which-is-by-far-their-highest-level-in-history)

 Written by [Charles-Henry Monchau, CFA, CMT, CAIA](https://blog.syzgroup.com/syz-the-moment/author/charles-henry-monchau) | Aug 10, 2026, 2:45:15 PM

[View full post](https://blog.syzgroup.com/syz-the-moment/sp-500-profit-margins-spiked-to-16.9-in-q2-which-is-by-far-their-highest-level-in-history)

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