A former Reserve Bank economist says the Official Cash Rate may not be able to be halted for long.

The central bank will give its latest update today, with economists predicting it will stay at 5.5 percent.

At its last review the bank expected it to remain at a restrictive level for some time.

But Michael Reddell told Mike Hosking you could make a credible case for at least signalling the prospect of some more tightening now, or in the next two or three months. 

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