AI safety fears fuel cyber stock surge

A Goldman Sachs (GS) basket of cybersecurity stocks has roughly doubled in value since hitting a low on April 10, underscoring a sharp resurgence in the sector. Within this group, individual names such as CrowdStrike (CRWD), Palo Alto Networks (PANW) and Fortinet (FTNT) have each gained more than 130% from that April low. The scale of the move has put cybersecurity shares among the stronger performers in technology-linked segments over this period.

The recent strength has not been confined to a handful of companies. Okta (OKTA) and Zscaler (ZS), alongside CrowdStrike (CRWD), Palo Alto Networks (PANW) and Fortinet (FTNT), all participated in the advance, signaling broad-based interest in listed cybersecurity providers rather than a narrow rally driven by one or two outliers.

From September 18 through September 23, Okta (OKTA), CrowdStrike, Zscaler (ZS), Palo Alto Networks (PANW) and Fortinet each rose by roughly 5% to 12%. These gains came on top of the strong recovery from April, reinforcing the perception of accelerating momentum in the group. Late in the week, some of these early advances were partially reversed as investors took profits.

Despite the pullback toward the end of the week, the sector remained on track for a second straight weekly increase. This pattern suggests ongoing buying interest even as short-term trading tempered the steepest part of the early-week move.

Banks and analysts link the upswing in cybersecurity stocks to increasing concern about the risks associated with advanced AI systems. Cybersecurity is being described as a "mega-theme and enabler of the AI era," reflecting expectations that protecting digital infrastructure will be central as AI tools proliferate. Large vendors such as CrowdStrike and Palo Alto Networks are seen as well positioned to benefit from this shift in spending priorities.

Surveys referenced by analysts indicate improving demand for cybersecurity products and services. These findings align with the recent price action, suggesting that investors are responding both to near-term spending signals and to a broader view that AI-related threats could sustain higher security budgets over time.

Alongside the rally, reported valuation multiples for major cybersecurity companies are high and vary markedly across different data sets. One compilation of trailing price-to-earnings ratios shows Fortinet at 59.8 times earnings, Okta (OKTA) at 114.4 times, Palo Alto Networks at 906.3 times and CrowdStrike at 6,507.6 times. The wide dispersion and elevated levels highlight how sensitive the sector has become to the underlying assumptions used to calculate earnings-based metrics.

Reflecting these concerns, analyst Peter Weed at Bernstein has warned that the cybersecurity sector may have "gotten over its skis." In response, he cut ratings on Palo Alto Networks, Okta and SentinelOne (S). This combination of strong demand signals, rapid share-price gains and caution over valuations frames a mixed outlook for investors assessing the sustainability of the recent rally.