Updated from 8:15 a.m. EDTShares of Infosys ( INFY) continued their march higher after the Indian tech outsourcer beat second-quarter earnings estimates and raised full-year guidance. The stock recently gained $3.31, or 4.5%, to $76.37. It has appreciated a hefty 81% in two years but was still off about 7% from its 52-week high, partly because of two consecutive disappointing quarters before the solid second-quarter report Tuesday. Infosys' second-quarter profit rose 42% from a year ago to $138 million, or 49 cents a share, beating the Thomson First Call consensus by 3 cents. Sales rose 38% from a year ago and 10% sequentially to $524 million, about $15 million ahead of estimates. The Bangalore-based company put third-quarter earnings at 53 cents a share on sales of $556 million to $558 million. Analysts were looking for earnings 50 cents on sales of $547 million. For the year, Infosys put earnings at $2.04 or $2.05 a share on sales of $2.14 billion, up from a previous estimate three months ago of $1.96 to $1.99 a share on $2.06 billion to $2.08 billion in sales. Analysts were predicting earnings of $1.96 a share on sales of $2.12 billion. Infosys, the largest Indian offshoring supplier that trades in the U.S. and widely viewed as a sector bellwether, said it added 34 new clients during the quarter to reach a total of 450 active clients. Total employment was 46,196 at Sept. 30, up a net 6,390 from the end of the first quarter. On a gross basis, Infosys added more than 8,000 employees -- a record for the company, noted CEO Nandan Nilekani. He also highlighted the company's double-digit sequential sales growth, which follows previous quarters of only single-digit growth.