---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/42670877.md"
description: "$Roundhill Memory ETF(DRAM.US)When Korean stocks fell, you were heavily invested in them. Now that they're starting a major rebound, you're heavily invested in Micron. Amazing. You really don't want us to make money, do you?"
datetime: "2026-07-15T01:29:26.000Z"
locales:
  - [en](https://longbridge.com/en/topics/42670877.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/42670877.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/42670877.md)
author: "[邓胡长红](https://longbridge.com/en/profiles/16685246.md)"
---

# $Roundhill Memory ETF(DRAM.US)When Korean stocks f…


### Related Stocks

- [DRAM.US](https://longbridge.com/en/quote/DRAM.US.md)
- [MU.US](https://longbridge.com/en/quote/MU.US.md)

## Comments (6)

- **不要频繁浇花 · 2026-07-15T02:30:41.000Z**: No, this ETF is really inexplicable. It follows SK when it falls and MU when it rises.
- **Alexu · 2026-07-15T02:28:19.000Z**: I guess his portfolio weight is calculated based on the NAV of each stock. If a stock's NAV proportion increases due to a rise, he will increase his holdings; if it falls, he will reduce his holdings.
  - **英伟达酒店** (2026-07-15T03:09:02.000Z): Wouldn't that be chasing rallies and selling off, typical naive investor behavior?
  - **Alexu** (2026-07-15T03:16:26.000Z): I think you can understand it as, in the initial dram basket, there is 1 share of each stock. Assuming SK Hynix plummets, its percentage share of the total value in this basket will decrease according
- **英伟达酒店 · 2026-07-15T01:37:20.000Z**: They also charge a 0.65% management fee.
- **big deal · 2026-07-15T01:35:49.000Z**: Yes, this thing works in reverse.