** Infosys INFY.NS rises 1.6% to 1,449 rupees
** Co says it will buy 75% stake in Versent Group, a wholly-owned unit of Australia's Telstra Group TLS.AX, for $153 mln
** Versent provides cloud services to Australian cos in finance, energy and other sectors
** Morgan Stanley says deal price doesn't appear to be expensive, shouldn't lead to dilution in Infosys's EPS
** Adds Versent has blue-chip client base; had collaborated with Infosys earlier
** Nomura says collaboration will help strengthen Infosys's presence in Australia
** YTD, INFY down ~23%