New Zealand currency hit the highest- level in one month against the U.S. counterpart on Thursday as the Reserve Bank of New Zealand made no adjustments to its monetary policy, leaving the key rate at 2.5% and pointed at possible tightening in policy next year. The RBNZ Governor Graeme Wheeler said that additional stimulus may be needed to curb the inflation that is expected to hover around 2% in 2014 in case housing pressure spill into consumer prices. The Official Cash Rate has been held at a half-century low of 2.5% since March 2011, when policymakers cut the refinancing rate after the Canterbury earthquake struck.