Stock markets in Europe and Asia rose and oil prices jumped on Wednesday after Chinese trade data cooled concerns over the world's second biggest economy, steadying money and currency markets in Shanghai and Hong Kong. Japan's Nikkei index jumped 2.6 percent and Europe's main markets gained after China reported exports dipped just 1.4 percent in U.S. dollar terms in December, compared to forecasts of an 8-percent drop.

A 4-percent fall in imports was also much smaller than many had feared, but the reaction was not uniformly positive.

Prices for copper - of which China is the world's biggest consumer - rose, but iron ore prices fell and Shanghai shares themselves fell between one and two percent.

Traders said the mood on many markets was still shaky after an extremely volatile start to 2016, driven by worries over conflict in the Middle East, China's finances and the fallout from extremely low oil prices.

"I am generally positive on the global outlook but the basis for that is being sorely tested right now," one London-based investment manager said. "Sentiment is very fragile."

Asian markets saw their first solid rally of the year, suggesting that some believe Beijing has done enough to gain control of the yuan for now. Overnight interest rates in Hong Kong, jacked up to 94 percent on Tuesday, were back near 4 percent. More stability in China would also leave the way clearer for the U.S. Federal Reserve to raise interest rates this year and the brighter tone drove the dollar around half a percent higher against the euro and yen.

Australia's dollar, often a proxy for China on major currency markets, gained 0.8 percent.

"The China story has dominated so far this year and it's nice not to be talking about other things such as the Fed," London retail currency broker FxPro's chief economist, Simon Smith, said.

"But this topic is likely to remain a dominant force in 2016, more so than in the past. This return of risk appetite we've seen so far this week may be temporary." Investors also pulled cash out of European bond markets in favor of stocks and the latest round of some 35 billion euros of government debt set to be sold in the euro zone this week also pushed up bond yields. Germany and Belgium are set to sell 10-year bonds on Wednesday. U.S. crude jumped almost a dollar to $31.25 a barrel, a day after breaching the $30 barrier for the first time in 12 years. Benchmark Brent was similarly higher at $31.69 a barrel. U.S. crude had fallen 17 percent in just seven sessions, a gift to consumers across the globe but also a strong force for disinflation.