(Adds details, comment from analyst) By Praveen Menon WELLINGTON, Feb 3 (Reuters) - New Zealand's jobless rate dropped unexpectedly and wages expanded, ruling out prospects for further central bank rate cuts and sparking talk that monetary tightening may be back sooner than expected. The seasonally adjusted unemployment rate dropped to 4.9% in the December 2020 quarter from 5.3% in the September 2020 quarter, Statistics New Zealand said in its statement. That beat forecasts by economists polled by Reuters who had expected an unemployment rate of 5.6%. The New Zealand dollar rose a quarter of a cent on the strong jobs data, as traders ruled out any rate cuts by the Reserve Bank of New Zealand (RBNZ). "Thoughts of further RBNZ easing have turned to thoughts of RBNZ tightening, via macro-prudential policy," said Jarrod Kerr, Chief Economist at Kiwibank. Kerr said RBNZ has already tightened conditions by bringing back mortgage lending