Nasdaq-100 Records Worst Week in 18 Months on Inflation and Debt

### Session Tape — Nasdaq-100 -5.5% (Week ending October 16)

## Catalyst Analysis: Tech Pullback and Macro Pressures

The Nasdaq-100 tumbled approximately 5.5% in the week ending Friday, October 16, marking its worst performance since the week ending Friday, April 4, 2025, when the index fell nearly 10%. Semiconductor equities bore the brunt of the sell-off; the VanEck Semiconductor ETF shed about 10% that week for its largest weekly drop since April 2025, while broader artificial intelligence plays retreated.

Underpinning the correction were escalating concerns regarding debt-funded corporate capital expenditure for artificial intelligence infrastructure, alongside hotter-than-expected inflation metrics and rising energy costs.

## Historical Resilience Following Sharp Weekly Declines

Despite the severity of the October 2026 pullback, historical tape data highlights a tendency toward subsequent recovery. Past severe weekly drops—such as the 10% slide in April 2025 or the pandemic-driven 11% plunge followed by a 53% gain—demonstrate that steep contractions are frequently succeeded by robust multi-quarter rebounds. Across historical analogs, the index traded higher a year later in roughly 78% of all recorded periods, compared to approximately 66% following severe weekly sell-offs.

### Money Play

- Macro volatility and semiconductor corrections demand close tracking of broader index vehicles and sector momentum as historical precedents suggest strong subsequent 12-month recoveries following deep weekly sell-offs.