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Market Overview - The A-share market experienced an increase, with the Shanghai Composite Index rising by 0.63%, the Shenzhen Component Index by 0.98%, and the ChiNext Index by 1.98%, while the North Stock 50 fell by 0.25% [2] - The total trading volume across the Shanghai, Shenzhen, and Beijing markets was 17,513 billion, with over 4,000 stocks rising [2] Key Sectors Cultivated Diamonds - The cultivated diamond sector saw significant gains, with companies like Power Diamond rising over 18% and Huifeng Diamond hitting a 30% limit up [6] - Power Diamond announced the successful cultivation of a 156.47-carat diamond, the largest known single crystal cultivated diamond, surpassing the previous record of 150.42 carats [8] - The cultivated diamond market in China is projected to grow, with imports and exports of rough cultivated diamonds expected to reach $12,296 million in 2024, a year-on-year increase of 82.11% [8] Precious Metals - The precious metals sector faced a sharp decline, with gold prices dropping from a historical high of $4,379 to a low of $4,185, marking a single-day drop of $194 [10] - Major companies in the sector, such as Shandong Gold and Zhongjin Gold, saw declines of over 6% and 5%, respectively [10] - The Shanghai Futures Exchange has issued warnings regarding market volatility and has adjusted margin requirements for gold and silver futures [12] Optical Modules - The optical module sector showed strong performance, with companies like Cambridge Technology hitting the limit up and others like Yuanjie Technology rising over 14% [15] - Recent reports indicate that overseas clients have increased their procurement plans for 1.6T optical modules, reflecting a growing demand driven by AI and network bandwidth needs [17] - The optical module market is experiencing rapid growth and technological iteration, with potential price stability due to supply shortages [17] Coal Sector - The coal sector has been active, with companies like Dayou Energy hitting the limit up and several others following suit [19] - Supply constraints due to policy tightening are driving the strength of coking coal prices, with production expected to be impacted by extended inspection periods for coal mines [21] - The market is also seeing price increases in downstream products like coke, further supporting bullish sentiment in the coal sector [21]