Qualys is exploding higher today, moving in strong tandem with peer Tenable Holdings, which is also seeing a double-digit gain. This upward momentum appears to be driven by a broader positive sentiment within the cybersecurity sector, as investors react to the industry landscape following recent performance reviews. While the California State Teachers Retirement System recently disclosed a significant increase in its stake by 13,255.9% during the second quarter, the stock's sharp move today reflects a wider rally across infrastructure software rather than a specific company-issued catalyst.