---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/42836060.md"
description: "The key is to see how the "Citigroup Economic Surprise Index" is defined. We didn't learn this in our finance classes either. I discovered this index while researching the topic of "What indices could provide early warnings if the All-Weather strategy fails?" I'll mark it down for now and write about it in the comments section later."
datetime: "2026-07-21T16:28:36.000Z"
locales:
  - [en](https://longbridge.com/en/topics/42836060.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/42836060.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/42836060.md)
author: "[新用戶_dLcvRX](https://longbridge.com/en/profiles/22978229.md)"
---

# The key is to see how the "Citigroup Economic …


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