** Shares of NIB Holdings NHF.AX rise as much as 6.7% to A$6.9, their biggest intraday jump since February 27; last up 5.7%
** The insurer is among top gainers on the Australian benchmark S&P/ASX 200 .AXJO, which is up 0.4%
** UBS upgrades rating to "Buy" from "Neutral" on top-line growth, upside on co's return on equity; also believes co's shares are trading at a discount given its P/E ratio
** Lifts price target to A$7.85 from A$7.35
**Also upgrades rating on healthy Australian Residents Health Insurance (ARHI) margins, optimistic on margin outlook
** 6 of 10 analysts rate the stock "Buy" or higher, 3 "Hold" and 1 "Sell"; their median PT is A$7.20 – data compiled by LSEG
** YTD, shares up 25.2% YTD
(Reporting by Nichiket Sunil in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com))