New Delhi, May 18 -- Nine out of the ten most valuable companies saw a combined increase of Rs.3.35 lakh crore in their market capitalisation last week, reflecting an overall positive momentum in the stock market, with Reliance Industries leading the surge.

Among the top 10 firms, HDFC Bank, Tata Consultancy Services (TCS), ICICI Bank, State Bank of India, Infosys, Bajaj Finance, Hindustan Unilever, and ITC recorded gains. Bharti Airtel was the only one to post a decline.

The BSE benchmark index rose by 2,876.12 points or 3.61% during the week.

Reliance Industries' market value rose by Rs.1,06,703.54 crore, reaching Rs.19,71,139.96 crore. ICICI Bank added Rs.46,306.99 crore, taking its valuation to Rs.10,36,322.32 crore.

TCS saw its m...