The surprise devaluation of China's currency Tuesday, prompting its biggest single-day drop in a decade, has created a ripple effect through commodities, as well as currencies and stock prices in Asian emerging markets.
After falling 2 percent Tuesday, the yuan's market rate fell another 1.6 percent Wednesday.
China's central bank, which strictly controls the currency, described the move as temporary and meant to make the value of the yuan more market-oriented.
"Looking at the international and domestic economic situation, currently there is no basis for a sustained depreciation trend for the yuan," the bank said Wednesday.
Commodities indexes also declined Wednesday, trading at levels not seen since 2003. Broad indexes of Asian stocks, excluding the Japan market, fell 2 percent, plunging to a two-year low.
A day after the yuan's trading band was loosened, resulting in about a 5 percent slide of the currency in global trading, Vietnam followed suit and widened the trading band around the dong.
Vietnam's move means "a currency war started almost immediately," said Marshall Gittler, head of Global FX Strategy at IronFX, based in Cyprus.
Other Asian governments may also be tempted to weaken their currencies to make their goods more attractive.
“If Thailand, Indonesia, Malaysia, Vietnam all decided they were going to win or gain market share by making their currencies significantly cheaper, then it's the averages citizens who pay the cost of that policy decision because they pay more for imported goods,” said Glenn Maguire, chief Asia-Pacific economist at ANZ Bank.
And that added cost to citizens is why many economists, such as Maguire, do not anticipate a currency war in Asia.
In Wednesday currency trading, described as “very jittery” by some traders, Malaysia's ringgit and Indonesia's rupiah were at 17-year lows against the U.S. dollar. The Australian and New Zealand dollars fell to six-year lows.
The Chinese central bank's decision to allow the yuan, also known as the renminbi, to significantly weaken is viewed by some analysts as a way for Beijing to export its problems to the rest of the world.
China has been criticized for keeping its currency undervalued to make its exports more competitive.
A customer counts Chinese Yuan notes at a market in Beijing, Aug. 12, 2015.
However, the International Monetary Fund said the devaluation "appears to be a welcome step."
"The exact impact will depend on how the new mechanism is implemented in practice," an IMF spokesman said in a statement. "Greater exchange rate flexibility is important for China as it strives to give market forces a decisive role in the economy and is rapidly integrating into global financial markets."
China would like the yuan to be included in the IMF's basket of traded currencies. Thus, a move to allow it to fluctuate more freely will likely be seen favorably by the IMF ahead of its decision next year on the yuan.
Worried consumers in Asia watching the currency market gyrations need to bear in mind that there are really two economies in China – one consuming goods from other Asian countries and China as an assembler of goods with parts coming from other Asian countries.
“That's not really going to change that much,” Maguire told VOA. “What will happen as a result of the move in the yuan is that the cost that companies, say like Samsung or Toyota, pay to assemble goods in China changes marginally. It affects their internal pricing mechanisms and accounts.”
Noting past trends “the adjustment of the renminbi, especially downward adjustments will have a stimulating effect on exports,” Zhang Yuzhong, deputy director of the China commerce ministry's investment promotion agency, told reporters in Beijing on Wednesday.
The volatility for the Chinese currency “will soon start to subside,” predicted Wells Fargo Securities global economist Jay Bryson in a special commentary, forecasting Chinese authorities “would take steps to stabilize the exchange rate well before a generalized rout occurred.”
Trader Anthony Riccio works on the floor of the New York Stock Exchange Tuesday, Aug. 11, 2015. Prices for oil and copper fell sharply after China's government lowered the value of its currency.
The devaluation of the Chinese yuan received a cautious reaction Tuesday in the U.S., which has long accused Beijing of keeping the value of its currency low to give Chinese exporters an unfair advantage.
U.S. Senator Chuck Schumer, a longtime critic of China's monetary policy, said the move is further evidence Beijing is artificially devaluing its currency.
However, the U.S. Treasury said it is too soon to determine implications of the move.
The change follows slumping exports and stock market turmoil in the world’s second-largest economy.
Analyst Gus Faucher of PNC Bank said the change in currency exchange policy is likely to “support growth in China.”
William Gallo contributed to this report from Washington.