India's BSE Sensex closed about 1.3% down at 80,238.85 on Monday, the lowest since September 2025 and extending losses for the third session. Market sentiment was hit hard following a sharp spike in crude oil prices amid escalating tensions in the Middle East, triggered by renewed US and Israeli strikes on Iran over the weekend and Tehran’s retaliation. A broad selloff was seen across sectors, with shares of aviation companies such as IndiGo (-4.3%) declining the most. Conversely, some defense stocks including Bharat Electronics (1.2%) showed resilience.