---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/38837257.md"
description: ""In the U.S. stock market, the historical probability of an investor making a profit in a single day is about 50%, the probability of making a profit over a one-year period is 68%, and the probability of making a profit over a 10-year period is 88%. Over a 20-year period, the probability of making a profit is 100%."Persistence is important, but I think there needs to be a prerequisite: deep personal understanding + good, large companies 🤔. If someone can consistently make money from the ups and downs of just 3-5 stocks in their lifetime, that's already quite impressive."
datetime: "2026-02-23T15:48:36.000Z"
locales:
  - [en](https://longbridge.com/en/topics/38837257.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/38837257.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/38837257.md)
author: "[Jason4HK](https://longbridge.com/en/profiles/21227604.md)"
---

> Supported Languages: [简体中文](https://longbridge.com/zh-CN/topics/38837257.md) | [繁體中文](https://longbridge.com/zh-HK/topics/38837257.md)


# "In the U.S. stock market, the historical prob…


## Comments (3)

- **小z同学 · 2026-02-23T15:52:35.000Z · 👍 1**: Bro, you are my comfort food.
  - **Jason4HK** (2026-02-23T17:12:59.000Z): For the big companies you're bullish on, hold them, and don't sell just because of a small rebound🤔
  - **小z同学** (2026-02-23T17:25:28.000Z): That makes sense.