Beijing - Shares on China's two stock markets jumped about 4 per cent Thursday, spurred by government economic measures and bucking the downward trend of other Asian markets.

The key Shanghai Composite Index, which tracks shares traded in foreign and local currencies, gained 3.68 per cent to end the day at 1,927.61, up 68.5 points.

Analysts said the surge was mainly caused by investor confidence generated by speculation that the government would introduce more measures to boost economic growth after the announcement Sunday of a package that included 4 trillion yuan (586 billion dollars) for infrastructure projects over the next two years.

The smaller Shenzhen Composite Index rose by 4.15 per cent, or 20.82 points, to close at 522.58.

The Shanghai index has risen 10.3 per cent in the four trading days since the government announced its economic package, but the Shanghai Daily newspaper quoted market analyst Wan Bing of GF Securites as saying the upward trend was unlikely to continue for long.

"We suggest investors be cautious as shares have rallied in the past several days and price swings are likely," Wan said. (dpa)