Why Is Qualcomm (QCOM) Stock Price Down 5.82% Today, Sep 18? Apple Cuts Reliance on Qualcomm Chips and Triggers QCOM Selloff

AI Market Summary
Qualcomm shares sold off after renewed focus on QCT margin compression (23%–25% vs 26%) and faster-anticipated loss of Apple modem revenue, with options expiration and heavy volume amplifying the move. The broader Nasdaq and several semis held up, indicating primarily idiosyncratic pressure tied to earnings quality and customer-concentration risk. Near-term trading sensitivity is elevated around support/resistance as investors reassess handset demand and diversification execution.
Impact level
● Medium
Affected assets
NCSKQCOM2USD/USDT+1.47%
AI Insight · NCSKQCOM2USD/USDTAI Insight
▼ Bearish
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Qualcomm (QCOM) fell 5.82% to $177.72 on September 18, 2026 as margin-pressure concerns and a higher-rate backdrop weighed on the setup. This draft reviews the daily outlook, the limits of the reported catalysts and the technical levels that frame the next move.