Qualcomm (QCOM) shares fell Thursday after the wireless-chip maker delivered a mixed March-quarter report and guided below Wall Street's targets for the June quarter. QCOM shares slumped more than 6% on the news. X The San Diego-based company late Wednesday said it earned an adjusted $2.15 a share on sales of $9.28 billion in its fiscal second quarter ended March 26. Analysts polled by FactSet had expected earnings of $2.15 a share on sales of $9.09 billion. On a year-over-year basis, Qualcomm earnings declined 33% while sales dropped 17% as it navigates a slowdown in smartphone sales. For the current...