The U.S. Global Jets ETF (JETS) moved lower during the pre-market session, continuing a downtrend driven by sector-wide concerns over rising fuel costs and their impact on profitability. In the preceding days, major carriers including American and United Airlines reported strong revenue but issued disappointing Q4 and full-year 2026 earnings guidance. The significantly weaker-than-expected profit outlooks were attributed almost entirely to a surge in jet fuel prices, which is pressuring margins across the industry and overshadowing resilient passenger demand.