---
title: "Memory Chips Sector Declines During Trading Hours, STX Falls Nearly 5%, WDC Drops Over 3%"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/299078683.md"
description: "During trading hours on September 15, the memory chip sector weakened broadly, with Seagate Technology leading declines at nearly 5%, while Western Digital and SanDisk also retreated, with only SNDQ moving higher."
datetime: "2026-09-15T16:46:26.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/299078683.md)
  - [en](https://longbridge.com/en/news/299078683.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/299078683.md)
generator: "portal-rs"
---

# Memory Chips Sector Declines During Trading Hours, STX Falls Nearly 5%, WDC Drops Over 3%

During trading hours on September 15, the memory chip sector weakened broadly, with mainstream stocks posting losses across the board. As of press time, Seagate Technology (STX.US) fell 4.82% to $766.70, leading the sector lower; Western Digital (WDC.US) dropped 3.20% to $413.27; SanDisk (SNDK.US) declined 1.65% to $1,526.33; Micron Technology (MU.US) edged down 0.05% to $923.57, showing relative resilience; Everspin (MRAM.US) fell 2.14% to $14.42.

Among derivative securities, performance diverged, with SNDQ.US bucking the trend up 3.42% to $14.98, SNXX.US falling 3.63% to $13.23, MUU.US slipping 0.20% to $28.09, and MUD.US flat at $10.73. The sector faced overall pressure as investor concerns over inventory levels and pricing cycles in the memory chip industry intensified, with capital flows turning negative.

## Sector constituents

| Name    | Ticker  | Last    | Change |
| ------- | ------- | ------- | ------ |
| MUD.US  | MUD.US  | 10.73   | 0.00%  |
| SNDQ.US | SNDQ.US | 14.98   | +3.42% |
| MUU.US  | MUU.US  | 28.09   | -0.20% |
| MU.US   | MU.US   | 923.57  | -0.05% |
| MRAM.US | MRAM.US | 14.42   | -2.14% |
| SNDK.US | SNDK.US | 1526.33 | -1.65% |
| WDC.US  | WDC.US  | 413.27  | -3.20% |
| SNXX.US | SNXX.US | 13.23   | -3.63% |
| STX.US  | STX.US  | 766.70  | -4.82% |

### Related Stocks

- [MU.US](https://longbridge.com/en/quote/MU.US.md)
- [SNDK.US](https://longbridge.com/en/quote/SNDK.US.md)
- [WDC.US](https://longbridge.com/en/quote/WDC.US.md)
- [STX.US](https://longbridge.com/en/quote/STX.US.md)
- [MRAM.US](https://longbridge.com/en/quote/MRAM.US.md)

## Related News & Research

- [Why Micron stock is falling hard today](https://longbridge.com/en/news/302765784.md)
- [Earnings to watch: Seagate (STX) reports Q3 results tomorrow](https://longbridge.com/en/news/303019917.md)
- [Western Digital Q1 2027 earnings preview: Analyst sentiment positive across the board](https://longbridge.com/en/news/302600754.md)
- [Micron Technology, Inc. $MU Stock Sold by Lmcg Investments LLC](https://longbridge.com/en/news/302854085.md)
- [Everspin Tech (MRAM) Set to Release Quarterly Earnings on Wednesday](https://longbridge.com/en/news/302540755.md)

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