** India's Sterlite Technologies STTE.NS extends gains to jump 13.5%, taking its two-day gain to 35%
** Stock set for best ever two-day gain
** STTE surged 19% on Monday after launching a generation of data centre solutions that includes high-performance fibre and copper cabling solutions designed for buildings, campuses and data centres
** More than 145 mln shares traded in stock's busiest session on record
** Stock extends YTD gains to 40%
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))