"The yuan went to the weakest end of its band after the 2012 band widening, which was 1 percent above the mid-point [for dollar/yuan]. Now we're there again, but now the top end of the band is 2 percent," said Nizam Idris, managing director, head of strategy, fixed income and currencies at Macquarie Bank in Singapore.
"The only significance today is that we are the furthest away from the fixing than ever before because now we can be. This is probably a reflection of China justifying a widening of the band, showing that the yuan can use up more than a 1 percent move each day," he added.
The yuan, also known as the renminbi, fell to 6.2003 per dollar, its lowest level since April 2013 and down 1.06 percent from a mid-point of 6.1351 to the dollar set by the central bank early on Wednesday.
China's central bank, the People's Bank of China (PBOC), on Saturday doubled the yuan's daily trading range to allow it to rise or fall 2 percent around a daily mid-point.