MUMBAI: The BSE benchmark sensex rallied by nearly 287 points to hit a fresh three-week high in early trade on Friday, mainly led by gains in IT stocks after Infosys revised guidance upwards for 2013-14 fiscal.

Besides, a firming trend in the global markets also buoyed the trading sentiment.

The 30-share index, which had gained 377.81 points in the previous three sessions, rose by 286.78 points, or 1.41%, to 20,559.69, with stocks of IT, technology, realty and banking sectors leading the rise in early trade. This is sensex’s highest level since September 20 this year.