New | RMB's sharp fall last week may be central bank's warning message

The sudden depreciation of the yuan last week was one of the largest three-day moves in recent years.
It spooked the market in much the same way as a curious episode in December 2008, when the currency depreciated 0.73 per cent in just one day during then US treasury secretary Henry Paulson’s visit to Beijing.
Another similar episode was in August 2010, when the People’s Bank of China unexpectedly raised the yuan reference rate by 0.5 per cent. In each of these moves, China markets plunged close to 2 per cent during the day and sent tremors across global markets.
It is still a mystery whether last week’s move was engineered by the PBOC or if it was the offshore hedge funds unwinding their yuan carry trades.
Our take is that it was likely to be a central bank move, as it was concurrent with a release of forex funds and declining market interest rates.
Otherwise, market interest rates should have moved higher to compensate for the depreciation in the yuan exchange rate.