MT Newswires -ShutterstockTechnology services shares gained the most on New Zealand's Exchange, rising nearly 2% by midday Tuesday. Shares of Gentrack Group (NZE:GTK, ASX:GTK) rose past 3% in recent trade. On the flip side, the commercial services sector saw a sell-off, shedding more than 3%. Shares of Livestock Improvement (NZE:LIC) fell more than 4% in recent trade.