Core Viewpoint - The aviation sector continues to experience a downward trend, influenced by rising fuel costs and geopolitical tensions, particularly related to U.S. tariffs on Indian goods and sanctions on Iran, which are raising supply chain concerns and risk premiums [1] Group 1: Stock Performance - As of the latest update, major Chinese airlines are seeing significant declines in their stock prices: China National Aviation (00753) down 4.51% to HKD 5.29, Capital Airport (00694) down 3.15% to HKD 3.07, Southern Airlines (01055) down 2.43% to HKD 3.62, and Eastern Airlines (00670) down 2.74% to HKD 2.84 [1] Group 2: Geopolitical Impact - U.S. President Trump announced a 25% tariff on goods exported from India starting August 1, warning of potential additional penalties due to India's continued energy purchases from Russia, which raises concerns about supply disruptions [1] - The new sanctions against Iran's oil transport network are further constraining global supply, contributing to increased risk premiums in the market [1] Group 3: Fuel Costs and Financial Implications - According to Guosen Securities, fuel costs remain the largest expense for airlines, and the rapid increase in oil prices is likely to lead to higher fuel surcharges, which may negatively impact demand due to cost pass-through effects [1] - Airlines are significantly exposed to foreign currency liabilities due to aircraft purchases and leases being primarily denominated in foreign currencies, and the implementation of new leasing standards since 2021 has amplified this exposure, leading to substantial foreign exchange losses that could severely affect current profits [1]