---
format: "aidr-story-markdown/v1"
id: "1c84a0680214eca7bf5b616e3893fcf47eed6e81891bf962634c27c226a0e5d9"
canonical_url: "https://aidr.today/1c84a068?lang=en"
title: "Nasdaq 100 Sinks 5.5% in Worst Weekly Drop Since April 2025"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-10-17T09:41:09.000Z"
category: "Industry"
topics: ["funding"]
source_urls: ["https://marketbrief.now/us-markets/nasdaq-100-sinks-55percent-in-worst-weekly-drop-since-april-2025-841326f8","https://x.com/Reuters/status/2111323846976393694","https://x.com/GlobalMktObserv/status/2111197104534352284","https://x.com/BullTheoryio/status/2111105337105281104","https://x.com/vector__news/status/2110755199081930876","https://x.com/KobeissiLetter/status/2111177356480032903","https://x.com/philippilk/status/2111195458588602431","https://x.com/BullTheoryio/status/2111146358623363194"]
summary: "The Nasdaq 100 fell 5.5% for its worst weekly drop since April 2025, erasing over $3 trillion in market value over 10 days as a nine-day semiconductor rout and concerns over AI infrastructure financing and tightening credit pressured US tech stocks. The S&P 500 also declined 2% over the week, its worst weekly performance since June, amid higher interest rates and energy price increases."
---

# Nasdaq 100 Sinks 5\.5% in Worst Weekly Drop Since April 2025

> [Open the canonical story](<https://aidr.today/1c84a068?lang=en>)

**Published:** 2026-10-17T09:41:09.000Z
**Category:** Industry
**Topics:** funding

## Summary

The Nasdaq 100 fell 5\.5% for its worst weekly drop since April 2025, erasing over $3 trillion in market value over 10 days as a nine\-day semiconductor rout and concerns over AI infrastructure financing and tightening credit pressured US tech stocks\. The S&amp;P 500 also declined 2% over the week, its worst weekly performance since June, amid higher interest rates and energy price increases\.

## Sources

- [Story source](<https://marketbrief.now/us-markets/nasdaq-100-sinks-55percent-in-worst-weekly-drop-since-april-2025-841326f8>)
- [Story source](<https://x.com/Reuters/status/2111323846976393694>)
- [Supporting source](<https://x.com/GlobalMktObserv/status/2111197104534352284>)
- [Supporting source](<https://x.com/BullTheoryio/status/2111105337105281104>)
- [Supporting source](<https://x.com/vector__news/status/2110755199081930876>)
- [Supporting source](<https://x.com/KobeissiLetter/status/2111177356480032903>)
- [Supporting source](<https://x.com/philippilk/status/2111195458588602431>)
- [Supporting source](<https://x.com/BullTheoryio/status/2111146358623363194>)