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

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.