Mumbai, May 27 -- The New Zealand dollar firmed up on Wednesday after the central bank left OCR rates unchanged and signaled possibility of further rate hikes in futures. The OCR will most likely need to increase sooner and by more than envisaged in the February Monetary Policy Statement, RBNZ said in the statement. The pace of OCR increases will depend on the relative influence of persistent wage- and price-setting behaviour versus weaker economic activity on medium-term inflation pressures, it further noted. The Committee remains focused on ensuring that increased costs do not lead to elevated inflation over the medium term, while avoiding unnecessary economic volatility. The central bank also noted that New Zealand's trading partners a...