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By Daniel Moss

TWO DECADES after China began allowing its currency to fluctuate, authorities are again standing in the way of an appreciation. It鈥檚 a reminder that the decision in 2005 to sever the yuan鈥檚 hard peg to the dollar, important as it was, came with strings attached.

While Beijing never walked away from the foreign-exchange market, recent interventions are noteworthy. They suggest a desire to preserve exports made more competitive by a weak currency and a worry that the domestic economy is softer than official growth numbers suggest. The problem is that this situation is unlikely to cure itself. Exports rose more than forecast in November, according to figures released on Monday, and the trade surplus for the first time. A raft of data later in the week, by contrast, are projected to point to a lackluster domestic picture.

Not that the yuan has suffered in 2025. It鈥檚 up almost 4% against the dollar and on course for the best in five years. But these gains are middling, considering the greenback is having a less-than-stellar time. The Malaysian ringgit, Thai baht, and Singapore and Taiwan dollars have done much better. Investors want to take the yuan higher, but keep encountering resistance from the People鈥檚 Bank of China.

One of the main ways for the central bank to signal intentions is through the setting of a reference rate for the currency; dealers try to predict the starting point for the day鈥檚 trade. Last week, the fixing was significantly weaker than forecast. State banks reinforced the , buying dollars to keep a lid on the yuan. Beijing recognizes the power of markets. FX trading has ballooned to $9.6 trillion a day, compared with just $1.9 trillion when the long practice of maintaining a value for the yuan of 8.3 per dollar ceased in 2005. It traded at around seven on Monday.

It鈥檚 not a stronger rate per se that repels the government. Rapid moves are anathema and decisions about the pace and degree of change must always reflect what top officials believe is the overall national interest. The challenge is how to preserve the export machine, while acknowledging the reasons behind the pressure for appreciation: A rally in local stocks, which draws money into the country, and an easing of trade tensions with the US, which tends to lift emerging markets, generally.

US President Donald Trump has historically moaned that a range of nations, China included, conspire to keep their currencies artificially weak to 鈥渞ip off鈥 the US. But in the most recent round of talks between the two countries, the yuan hasn鈥檛 been a sticking point, and tariffs have come down from levels that would have crippled the economy. Washington and Beijing appear content to come to mini-deals every few months to stop the relationship nosediving. Not allowing any yuan gains might jeopardize this relative detente.

President Xi Jinping should go further and let it advance some more. According to two former American officials, the yuan could be undervalued to the tune of , based on International Monetary Fund estimates. A number of large banks, including Goldman Sachs Group, Inc., tip advances next year. Prominent Chinese economists, while careful to not be sharply critical in their commentary, see plenty of scope for upward movement. It may even help the economy 鈥 over time 鈥 by stimulating local demand. The question will be whether the short-term disruption and difficulties will persuade top policymakers that it鈥檚 a worthwhile step.

The time has come to let the yuan , says Miao Yanliang, chief strategist at China International Capital Corp., and a former top economist at the foreign-exchange regulator. The dollar is likely to be soft for a few years. It鈥檚 natural for other currencies to rise in that environment; to hold the yuan back would be to allow it to depreciate against other trading partners.

It鈥檚 not without risks. China has been and a strong currency could exacerbate the difficulties. Activity could use a boost in other areas: Retail sales have been disappointing, along with industrial production and employment, while investment is languishing. By lowering the cost of imports, they could become more attractive to consumers.

The case for rebalancing China鈥檚 economy away from exports is a familiar one. It lurks behind many of the calls for appreciation in the 20 years since the hard link was broken. And it was one of the arguments in favor of reforming the trading rules in 2005 鈥 along with heading off protectionist bills in the US Congress. Now, there is a trade-barrier fan in the White House. Extracting concessions from China these days is all about getting it to buy more soybeans and allow the West to purchase the rare minerals so critical to modern manufacturing.

Encouraging further yuan strength, or not standing so vigorously in its path, makes sense.The alternative is a sudden move, with disruption that entails. In 2005, China did just enough to quell the arguments of yuan bulls. Not a bad approach to adopt today. The pressure isn鈥檛 going away.

BLOOMBERG OPINION