Shares of Firstsource Solutions rallied 16 per cent to hit a fresh record high of Rs 106.40 on the BSE on Monday on the back of heavy volumes. The stock of the global provider of Business Process Management (BPM) services has zoomed 48 per cent in the past four trading sessions. On Thursday, the stock hit an intra-day high of Rs 94, surpassing its previous high of Rs 93, touched on May 15, 2007. The trading volumes on the counter more-than-doubled with a combined 10.65 million equity shares, representing 1.5 per cent of the total equity of Firstsource Solutions, changing hands on the NSE and BSE, till 09:48 am. In comparison, the S&P BSE Sensex was up 0.64 per cent at 47,273 points.