<h1>Benchmark indices rebound after volatile session; metal stocks lead gains as GST Council eyes 5% and 18% tax rationalisation</h1> Benchmark equity indices recovered in a volatile session, with the 30-stock index rising 409.83 points to 80,567.71 and the 50-stock index gaining 135.45 points to 24,715.05 after intraday swings. Rallying metal stocks and optimism ahead of a two-day GST Council meeting considering tax-rate rationalisation to 5% and 18% underpinned gains, while several IT and utilities firms lagged. Foreign institutional investors were net sellers of about Rs 1,159.48 crore. Asian markets were mixed and European equities traded higher, while global Brent crude fell 1.52% to USD 68.09 a barrel.