Qualcomm (QCOM.US) stock plunged more than 10% after the chipmaker reported mixed quarterly results. Qualcomm came in 7 cents ahead of estimates, with quarterly earnings of $2.17 per share. Company said revenue was $8.24 billion, a gain of 62% from a year earlier. Analysts, on average, expected. $8.25 billion. However shares fell after the semiconductor said chip supply constraints were hampering its sales growth in its fiscal first quarter.
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