** Shares of Warehouse Group Ltd WHS.NZ slump as much as
14.6% to NZ$2.050, their biggest intraday pct loss since March
26, 2020
** Retail service company says HY net profit after tax fell
60.9% to NZ$17.4 mln ($10.82 mln)
** Company says HY sales grew 4.8% to NZ$1.8 billion
** WHS expects the remainder of FY23 to be challenging
** Shares hit their lowest since Oct. 9, 2020
** Stock down 7.7% YTD, as of last close
($1 = 1.6077 New Zealand dollars)
(Reporting by Echha Jain in Bengaluru)
((Echha.jain@thomsonreuters.com))