Hong Kong's Hang Seng Index decreased 126.97 points, or 0.49 percent, to 25,882.43 points in the morning session on Tuesday.

The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, opened 1.09 percent higher at 1,777.43 points on Tuesday. The STAR 50 Index, which tracks the 50 largest stocks listed on the board that also meet certain liquidity requirements, opened 1.08

The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, was up 1.54 percent to open at 3,353.51 points Tuesday. The ChiNext Index, together with the Shenzhen Component Index and other indices, reflects the performance of stocks listed on the Shenzhen Stock Exchange.

Chinese stocks opened higher on Tuesday, with the benchmark Shanghai Composite Index up 0.18 percent to open at 3,816.37 points. The Shenzhen Component Index opened 0.93 percent higher at 13,572.95 points.

The Hang Seng Index gained 81.58 points, or 0.31 percent, to open at 26,090.98 points on Tuesday.

U.S. stocks ended materially higher on Monday as oil prices declined after U.S. President Donald Trump called off planned military strikes against Iran.

Carbon emissions allowances closed at 38.57 yuan (5.68 U.S. dollars) per tonne on Monday, 0.73 percent up from last transaction day at Guangzhou Emissions Exchange.

HONG KONG, Aug. 3 (Xinhua) -- Five-year RMB treasury bond futures debuted at the Hong Kong bourse on Monday, marking the first RMB treasury bond futures contract traded in the offshore market.The product is expected to complement Bond Connect and Swap Connect by providing international investors with an effective offshore hedging tool to meet their growing need for managing government bond-related risks.Today's launch is far more than a new product -- it closes a critical gap in our offshore RMB toolkit. We are building a more complete offshore renminbi ecosystem, one in which investment, pricing, and risk management reinforce one another, said Paul Chan, financial secretary of the Hong Kong Special Administrative Region government.This is an important step in supporting the long-term development of the offshore RMB bond market and the broader process of the internationalization of RMB, Chan said.Global investors now hold 3.2 trillion yuan (about 474 billion U.S. dollars) of onshore Chinese bonds, according to the China Securities Regulatory Commission.

Hong Kong's stock market closed higher on Monday with the benchmark Hang Seng Index up 0.48 percent to end at 26,009.40 points.The Hang Seng China Enterprises Index rose 0.46 percent to 8,652.15 points, while the Hang Seng Tech Index ticked up 0.96 percent to 4,875.61 points.

The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, closed 3.39 percent lower at 1,758.21 points on Monday.

The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, lost 1.24 percent to close at 3,302.55 points Monday.

Chinese stocks closed lower on Monday, with the benchmark Shanghai Composite Index down 0.59 percent to 3,809.66 points.

Hong Kong's Hang Seng Index edged up 11.01 points, or 0.04 percent, to 25,895.44 points in the morning session on Monday.

The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, opened 0.78 percent lower at 1,805.62 points on Monday.

Chinese stocks opened lower on Monday, with the benchmark Shanghai Composite Index down 0.51 percent to open at 3,812.61 points.The Shenzhen Component Index opened 0.6 percent lower at 13,497.1 points.

The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, was down 0.71 percent to open at 3,320.09 points Monday.

The Hang Seng Index gained 102.88 points, or 0.4 percent, to open at 25,987.31 points on Monday.

Hong Kong's Hang Seng Index market ended higher Friday with the benchmark Hang Seng Index up 0.1 percent to close at 25,884.43 points. The Hang Seng China Enterprises Index dipped 0.38 percent to end at 8,612.15 points, while the Hang Seng Tech Index ticked up 0.53 percent to 4,829.22 points.

The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, closed 3.69 percent higher at 1,819.9 points on Friday. The STAR 50 Index, which tracks the 50 largest stocks listed on the board that also meet certain liquidity requirements, closed 2.99

The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, gained 3.06 percent to close at 3,343.96 points Friday. The ChiNext Index, together with the Shenzhen Component Index and other indices, reflects the performance of stocks listed on the Shenzhen Stock Exchange.