---
title: "Weekly Recap | CIEX.US +27.51%, AI data-centre theme in focus"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/301475175.md"
description: "CIEX.US rallied 27.51% this week to close at $17.14, while the S&P 500 added 1.15%, putting the ETF about 26.36 percentage points ahead of the benchmark. The move was not a straight line: Monday opened at $12.811 and drifted higher, Tuesday gapped up and ran to $16.87, Wednesday pushed to $17.05, Thursday pulled back to $15.28, and Friday recovered to end near the high of the week. The weekly range was 36.02%, pointing to a sharp pickup in volatility."
datetime: "2026-10-10T08:27:36.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/301475175.md)
  - [en](https://longbridge.com/en/news/301475175.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/301475175.md)
generator: "portal-rs"
---

# Weekly Recap | CIEX.US +27.51%, AI data-centre theme in focus

## The Week

CIEX.US rallied 27.51% this week to close at $17.14, while the S&P 500 added 1.15%, putting the ETF about 26.36 percentage points ahead of the benchmark. The move was not a straight line: Monday opened at $12.811 and drifted higher, Tuesday gapped up and ran to $16.87, Wednesday pushed to $17.05, Thursday pulled back to $15.28, and Friday recovered to end near the high of the week. The weekly range was 36.02%, pointing to a sharp pickup in volatility.

## Sector News

This week’s flow was dominated by AI data-centre interconnect demand and the optical communications theme. Multiple reports highlighted surging AI data-centre interconnect demand and listed US optical communications names to watch. Coverage also zeroed in on Ciena Corp (CIEN), which moved up 11.02% on Oct 6 and 5.55% on Oct 9, mirroring the underlying swings in this ETF. On the insider side, Ciena EVP and Chief Customer Officer Jason Phipps sold 2,629 common shares worth roughly $933,000. Overall, the sector narrative came from the AI data-centre and optical theme, without heavy holdings news dragging the space lower.

## The Week Ahead

Next week’s calendar leans on US inflation and real-economy data. On Wednesday, Oct 14, the market gets CPI and core CPI readings; one core CPI measure shows a prior of 2.4 and a forecast of 2.5, while a separate CPI print shows a prior of 3.4 and a forecast of 3.7. If inflation surprises in either direction, rate expectations could reprice. The week also starts with the NFIB small business optimism index and existing home sales. For a 2x daily leveraged ETF, the underlying’s swings get amplified, and volatility typically picks up around inflation releases.

## In Short

CIEX.US’s jump this week coincided with heavy attention on AI data-centre interconnect and optical communications, while insider selling offered a counter-detail. On the latest trading day, retail flows were slightly net positive, but that is a single-day snapshot rather than a weekly trend. Standard PE and PB do not apply here, and the very high turnover rate reflects the fast-trading nature of a leveraged product. The key to watch next is how rate expectations shift after the inflation data and whether the underlying can hold its current range near the highs.

*This article is generated by LongbridgeAI from market data, for information only and not investment advice.*

### Related Stocks

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

## Related News & Research

- [AI Data Center Interconnect Demand Surges: Which Optical Communication Stocks Benefit Most? 5 US Stocks to Watch](https://longbridge.com/en/news/300988508.md)
- [Ciena names Monika Fahlbusch chief people officer](https://longbridge.com/en/news/301592140.md)
- [Supermicro showcases OCP-ready AI data center portfolio at OCP Global Summit](https://longbridge.com/en/news/301730560.md)
- [Micron's Monster Rally Faces Reality Check: China, Bearish Bets and AI Jitters](https://longbridge.com/en/news/301690300.md)
- [Lumentum, Astera Labs and Corning demo 1060nm VCSEL-based PCIe-over-optics for AI rack-scale connectivity at OCP Global Summit](https://longbridge.com/en/news/301740385.md)

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