(Bloomberg) -- China’s consumer prices fell last month at the fastest pace since the global financial crisis, piling pressure on the government to support a stumbling economic rebound that’s roiling markets.

The consumer price index dropped 0.8% in January from a year ago, the National Bureau of Statistics said Thursday, the weakest since September 2009. The drop was worse than economists’ expectations for a 0.5% decline.

The producer price index fell 2.5%, compared with projections for a 2.6% decrease. Factory-gate costs have been stuck in deflation for 16 straight months.

The latest data may add to calls for China to do more to stimulate the economy and reverse a stock market slide. Confidence in the world’s second-largest economy has flagged despite efforts by the government to add stimulus, including measures such as unleashing long-term cash for banks and issuing more government bonds to fund construction projects. 

China has also taken a slew of moves to arrest the $5 trillion equities selloff. President Xi Jinping was set to get a briefing from regulators on the rout, Bloomberg News reported earlier this week. Then late Wednesday, China replaced the head of the main securities regulator, sending shockwaves across the industry.

“The CPI data today shows China faces persistent deflationary pressure,” said Zhiwei Zhang, president and chief economist at Pinpoint Asset Management Ltd. “China needs to take actions quickly and aggressively to avoid the risk of deflationary expectation to be entrenched among consumers.”

The benchmark CSI 300 Index rose 0.4% on Thursday, in line for a fourth day of gains. The yuan was little changed at 7.1945 per dollar.

Read More: Everything China’s Doing to Rescue Its Battered Stock Market

China has been beset by falling prices for much of the last year as the nation struggles to revive domestic demand and consumer confidence. A measures of economy-wide prices marked its longest slide since 1999 in the fourth quarter, underscoring the magnitude of the challenge as policymakers look to boost growth this year.

What Bloomberg Economics Says...

“The report drives home a message — the economy needs aggressive policy steps to boost demand and shake confidence out of its torpor. The People’s Bank of China has signaled that fighting deflation is a priority and looks set to deliver more stimulus. The question is, how forceful it will be — and whether banks pass on the easing in the form of more and cheaper credit.”

- Eric Zhu, economist

Read the full report here.

Core CPI, which strips out volatile food and energy costs, rose 0.4%, slower than December and the weakest rise since June last year. Pork prices dropped 17%, helping drag down food prices by 5.9%, which was the biggest decline on record in data back to 1994. 

The risks from deflation are serious. If China is unable to meaningfully turn the trend around, it risks leading to a downward spiral with people holding off on purchases due to expectations prices would continue falling. That would dent overall consumption and spill over to businesses.

Read More: China Limps Into Year of Dragon, Stalked by Deflation

Economists see deflation pressure in China continuing for at least another six months, largely because of the real estate turmoil. While China was able to reach an official growth goal of “around 5%” in 2023, repeating a similar performance this year may be difficult without bigger efforts by policymakers. 

“The prolonged property woes and stock market volatility hurt household sentiment,” said said Raymond Yeung, chief economist for Greater China at Australia & New Zealand Banking Group Ltd. 

“Deflationary pressure remains strong,” driven by a lack of demand leading to over capacity, he said. There is an “imminent need” to cut rates, and the weak inflation data can offer a good excuse to do so, Yeung added. 

Read More: Xi’s Markets Shakeup Surprised Insiders, Showing Alarm Over Rout

(Updates with more context and comments.)

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