---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/100000000796723.md"
description: "SK Hynix ADR went vertical, +27% in a day, US premium now ~51% over the Seoul shares as options started trading. Barclays Overweight, 12-layer HBM4 in mass production, Korea's $531B AI budget behind it. this is the HBM king and Wall Street just woke up to it. i play memory through the basket $Roundhill Memory ETF (DRAM.US)$ rather than chase a +27% single-day candle though."
datetime: "2026-07-15T05:07:12.000Z"
locales:
  - [en](https://longbridge.com/en/topics/100000000796723.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/100000000796723.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/100000000796723.md)
author: "[orange](https://longbridge.com/en/profiles/25748050.md)"
generator: "portal-rs"
---

# SK Hynix ADR went vertical, +27% in a day, US prem…


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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**