---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/39236034.md"
description: "26-3-13With a cost of 0.55, and no awareness of setting stop-loss, you just keep hoping for a surge. This is not feasible. Occasionally, you might get lucky and make some profit, but if you don't control your position size, this will definitely lead to a huge loss!$NVIDIA(NVDA.US)$Tesla(TSLA.US)$Invesco QQQ Trust(QQQ.US)"
datetime: "2026-03-12T23:46:02.000Z"
locales:
  - [en](https://longbridge.com/en/topics/39236034.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/39236034.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/39236034.md)
author: "[Z兄交易笔记](https://longbridge.com/en/profiles/11553131.md)"
---

> Supported Languages: [简体中文](https://longbridge.com/zh-CN/topics/39236034.md) | [繁體中文](https://longbridge.com/zh-HK/topics/39236034.md)


# 26-3-13With a cost of 0.55, and no awareness of se…


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- [ProShares Short QQQ (PSQ.US)](https://longbridge.com/en/quote/PSQ.US.md)
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- [Tesla, Inc. (TSLA.US)](https://longbridge.com/en/quote/TSLA.US.md)
- [ProShares UltraPro Short QQQ (SQQQ.US)](https://longbridge.com/en/quote/SQQQ.US.md)
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## Comments (1)

- **Z兄交易笔记 · 2026-03-13T04:40:57.000Z**: Back to square one overnight$Invesco QQQ Trust(QQQ.US)$NVIDIA(NVDA.US)$Apple(AAPL.US)$Tesla(TSLA.US)$Western Digital(WDC.US)