Why Is Qualys, Inc. ( $QLYS) Stock Down -9.87% Today? The primary catalyst was the third-quarter earnings report released after Monday's close: a beat on both r

Why Is Qualys, Inc. ( $QLYS) Stock Down -9.87% Today? The primary catalyst was the third-quarter earnings report released after Monday's close: a beat on both revenue and earnings, but a fourth-quarter billings outlook that signals a return to high-single-digit growth.