---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/42768646.md"
description: "Of course, there are concerns about stock trading.- Tier 1 (small pullback of 5%): Use 10% of idle cash to open a small position for trial;​- Tier 2 (pullback of 10%): Add another 20% in cash;​- Tier 3 (deep pullback of over 15%): Add the remaining 30% to increase position;Reserve 40% in cash to 应对 extreme bear market crashes, never fully invested."
datetime: "2026-07-17T13:15:03.000Z"
locales:
  - [en](https://longbridge.com/en/topics/42768646.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/42768646.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/42768646.md)
author: "[浩浩荡荡地](https://longbridge.com/en/profiles/19784218.md)"
---

# Of course, there are concerns about stock trading.…