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Semiconductor Index Falls 11%—Biggest Weekly Drop Since 2025

7/17/2026

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Summary

Story summary

The Philadelphia Stock Exchange Semiconductor Index fell 11% this week, its biggest one-week drop since March 2025, and sits 24% below its late-June peak, confirming a bear market.
Nvidia fell 3.4%, AMD slid 4.9%, Applied Materials dropped 6.5%, Micron and SanDisk slipped about 1% each and SpaceX fell 4.5% after a Starship abort.
Alphabet, Tesla and Intel will report earnings next week, testing whether tech sector can halt the slide.

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Story summary

The Philadelphia Stock Exchange Semiconductor Index fell 11% this week, its biggest one-week drop since March 2025, and sits 24% below its late-June peak, confirming a bear market.
Nvidia fell 3.4%, AMD slid 4.9%, Applied Materials dropped 6.5%, Micron and SanDisk slipped about 1% each and SpaceX fell 4.5% after a Starship abort.
Alphabet, Tesla and Intel will report earnings next week, testing whether tech sector can halt the slide.