(Yicai Global) Oct. 18 -- With global institutions upbeat about the Chinese economy, China's yuan has gained nearly 1 percent against the dollar since last month.

The onshore yuan-dollar exchange rate was 6.614 at 2.30 p.m. yesterday, up from 6.6785 at the end of last month.

Four factors helped push up the yuan's exchange rate, said Xie Yaxuan, chief macro analyst at China Merchants Securities Co. [SHA:600999]. First, China's manufacturing purchasing managers' index reached 52.7 percent last month, substantially higher than market expectations, Xie said. Second, institutions such as the International Monetary Fund have raised growth forecasts for China for this year, bolstering market confidence, said Xie. Third, the latest US inflation data came in below expectations, leading to a decline in the dollar index, he said. Fourth, the international movement of capital has improved, he said.

The yuan's exchange rate has increased again as China's economic growth beat expectations, said Zhou Hao, chief China economist at Commerzbank AG [ETR:CBK].

Individual demand for foreign currency to be used for overseas trips has declined after the National Day holiday, which also helps reduce the seasonal downward pressure on the yuan, Xie said.

Foreign currency sales at banks under service trade are usually significantly higher in September than in October.

Though the US Federal Reserve has begun to cut its balance sheet this month and may implement another rate hike in December, uncertainties about fiscal stimuli and persistently weak inflation in the US are set to weigh on the dollar.

"Lower-than-expected inflation has added to uncertainty over the Fed's policy," said Stephen Innes, chief trader for Asia-Pacific at forex brokerage Oanda Corp. "Weak inflation will continue to haunt dollar bulls in the future."

Institutions project that without a sharp rise in US inflation, the dollar is unlikely to appreciate substantially.

They expect the yuan to fluctuate within a range against the greenback in the fourth quarter and believe that a sharp depreciation of the Chinese currency is unlikely.