Why Is QuinStreet ( $QNST ) Stock Down -14.89% Today? (Find out why any stock moved today on Tickeron.) QNST shares fell roughly 14.89%, sliding from a prior close of $17.26 to about $14.69 in intraday trading. The decline came without a single company-specific announcement, pointing to a combination of sector-wide risk-off sentiment and profit-taking after a sharp run-up. Ongoing insider selling and peer weakness across the performance-marketing and financial-marketplace group weighed on investor confidence. $DV $QMMM $NEXN $MGNI $ZD