HighPeak (HPK), Halliburton (HAL) Fall on Crude Slump, Zscaler (ZS) Dives 31.5% on Earnings; Viasat (VSAT) Gains on Contract

Energy stocks retreated and tech shares were rattled on May 27, 2026, as a 4.7% plunge in WTI crude to $92.94—driven by progress on an Iran-U.S. peace deal—dragged HighPeak Energy and Halliburton lower. Zscaler shares cratered 31.5% after the cloud security firm reported fiscal third-quarter results that topped estimates but disclosed rising memory, storage, and processor costs, along with sales-department turnover. Oil producer HighPeak Energy dropped 3%, while oilfield services giant Halliburton fell 3.8%. In cybersecurity, CrowdStrike slipped 4% in sympathy with Zscaler’s sell-off. Bucking the trend, Viasat advanced 4.2% after it and Intelsat General Communications won a U.S. Space Force contract, highlighting satellite-sector resilience.