Shares of the following companies had unusual moves in Vietnam trading. Stock symbols are in parentheses and prices are as of the 2:15 p.m. close in Ho Chi Minh City.

The VN Index (VNINDEX), the benchmark measure of the Ho Chi Minh City Stock Exchange, rose 1 percent to 422.37. The gauge lost 4.2 percent since the end of March, the biggest quarterly decline since the three months ended Dec. 30. The index has jumped 20 percent this year.

Rubber stocks: Phuoc Hoa Rubber Joint-Stock Co. (PHR) , the country’s biggest listed rubber company by market value, climbed 2.7 percent to 30,100 dong, the steepest advance since June 15. Danang Rubber Joint-Stock Co. (DRC) gained 2.4 percent to 26,100 dong. Southern Rubber Joint-Stock Co. (CSM VN) advanced 2.4 percent to 25,300 dong

Shipments from Vietnam, the fourth-biggest exporter in 2010, may rise 16 percent from a year earlier this month to 65,000 metric tons, according to the General Statistics Office. Exports in the first half of the year were estimated at 407,000 tons, up 41 percent from a year earlier.

HUD1 Investment and Construction Joint-Stock Co. (HU1 VN), a property investment and construction company, climbed 4.8 percent to 13,200 dong, the biggest advance since May 9. The company will pay its shareholders a 2011 dividend of 2,000 dong a share in July, it said in a statement on the bourse’s website.