Nifty surged past 25,000 in early trade on Monday, lifted by GST reform hopes and broad-based buying across autos, durables, and cement. Maruti and Hero Moto rose 7%, while Voltas and PG Electroplast jumped 7%. FIIs sold ₹1,900 crore last week, making sustainability above 25,000 key. Analysts flagged support at 24,600 and advised caution until FIIs turn net buyers.