Affordable stocks to buy today 19 Jun 2026 under Rs 500: SJVN Rs 72.88, NHPC Rs 75.82, IRFC Rs 99.51, Ircon Rs 137.19, Wipro Rs 180.80, RVNL Rs 243.99, ITC Rs 292.50, Power Grid Rs 292.25, BPCL Rs 306.60, PFC Rs 431.