Zscaler stock crashed 18.3% this week despite beating Q3 fiscal 2026 earnings and sales estimates and raising full-year guidance. The cybersecurity company reported adjusted EPS of $1.08 on $850.48M in sales (up 25.4% YoY), but investors reacted negatively to guidance showing significant growth deceleration to 16-17% in fiscal 2027 from 24-25% in fiscal 2026. The stock is down roughly 49% over the last year.

Ten large-cap stocks experienced significant declines during the week of May 25-29, 2026. Zscaler led losses with a 20.06% drop following disappointing Q3 results and weak Q4 guidance. Other major losers included Boston Scientific (16.95%), AutoZone (14.21%), Regencell Bioscience (12.61%), and Venture Global (10.87%). Declines were attributed to earnings misses, analyst downgrades, and energy sector weakness following geopolitical developments.

Zscaler's stock fell over 30% after issuing weak guidance for Q4 and fiscal 2027, despite beating Q3 earnings expectations. The company cited the departure of two sales executives and struggles attracting new customers as reasons for the cautious outlook. While the stock now trades at an attractive 5x forward price-to-sales multiple and shows strength in existing customer expansion and AI solutions, the analyst recommends waiting due to slowing core growth and leadership concerns.

Zscaler stock experienced a significant sell-off following disappointing Q3 2026 earnings results, with decelerating revenue growth concerning investors. The article examines whether the market has overreacted to the news and whether this presents a buying opportunity for long-term investors in the cybersecurity sector.

Zscaler's stock plummeted 30% following Q3 earnings due to increased spending on AI and infrastructure investments, despite solid revenue growth of 25.5% and strong guidance. Analysts view the decline as a buying opportunity, with institutional investors accumulating shares and support expected in the $120-$140 range. The primary concern is near-term cash flow pressure, though long-term growth prospects remain intact.

Palo Alto Networks (PANW) stock fell 3.2% on May 27, 2026, experiencing spillover effects from Zscaler's post-earnings sell-off. Although Zscaler beat earnings estimates, its weak full-year guidance spooked investors about potential overvaluation in the cybersecurity sector. Palo Alto is scheduled to report Q3 fiscal 2026 results on June 2, with expectations for ~28.5% year-over-year sales growth.

The Dow Jones Industrial Average reached a record high above 50,600 while the Nasdaq 100 declined 0.7% on Wednesday. Oil prices fell sharply below $90 per barrel following reports of potential Iran negotiations, benefiting travel and leisure stocks. The S&P 500 edged slightly lower as semiconductor stocks retreated, while consumer discretionary and hospitality sectors led gains.

U.S. stock futures rose on Wednesday following a mixed Tuesday session where the Nasdaq advanced led by tech stocks while the Dow ended lower. Key movers include United Microelectronics jumping 11.24% after acquiring manufacturing equipment, Braiin tumbling 13.45% after a 74% surge, Box declining 2.42% despite beating earnings expectations, and Zscaler falling after missing revenue guidance. The 10-year Treasury yield stands at 4.46%, with markets pricing a 99.9% likelihood of unchanged Fed rates in June.

Zscaler reported strong Q3 earnings with revenue of $850.48M (beating estimates) and raised full-year guidance, but shares fell 24.86% in premarket trading due to lower-than-expected Q4 revenue guidance of $875-878M versus consensus of $878.53M. The company cited recent sales leadership transitions as impacting near-term outlook, though management maintained a constructive FY27 outlook with expected 16-17% ARR and revenue growth.

US equities rallied post-Memorial Day with strong AI and small-cap leadership, as de-escalation hopes in the US-Iran conflict drove oil prices lower. Micron Technology surged 18% to cross $1 trillion market cap on a UBS price target hike, while quantum computing and space stocks rallied on government funding and SpaceX IPO anticipation. The Nasdaq rose 1.11% and Russell 2000 jumped 1.74%, though the Dow declined 0.19% as defensive sectors unwound.

U.S. stock futures rose on Tuesday following Memorial Day, with the S&P 500 and Nasdaq 100 gaining 0.52% and 0.73% respectively. Despite U.S. defensive strikes on Iranian missile sites, markets remained resilient as oil prices fell and Iran negotiations progressed. Key movers included Elbit Systems jumping 8.26% on a $1.4B military contract, Intuitive Machines soaring 10.27% on a NASA lunar contract, and SCYNEXIS plunging 16.38% after announcing a reverse stock split.

ShawSpring Partners exited its entire 253,959-share position in monday.com for approximately $24.37 million as the stock has declined 73% over the past year. Despite the sharp stock decline, monday.com's fundamentals remain strong with 24% revenue growth, doubled operating income, and expanding enterprise adoption, suggesting the market may be overly pessimistic about the company's prospects.