Railway stocks surged by nearly 16 per cent even as benchmark indices concluded the trading session on a flat note. RVNL (Rail Vikas Nigam Ltd) alone surged by nearly 35 per cent in just 2 trading sessions on the National Stock Exchange. IRFC (Indian Railway Finance Corp Ltd) witnessed a surge of nearly 7.58 per cent on Monday. IRCON (Indian Railway Construction International Ltd) ended the trading session at Rs 326 price level, up by more than 6 per cent.