沪锡：周中小幅升至27.4万元/吨，或在27-27.7万震荡

Group 1 - The core viewpoint of the article indicates that tin prices have shown a slight increase due to macroeconomic factors, particularly expectations of interest rate cuts by the Federal Reserve, which have boosted valuations in the non-ferrous metals sector [1] - The main tin futures contract price reached 274,000 yuan per ton, with spot prices showing a premium of 200 yuan per ton [1] - The inventory levels at the Shanghai Futures Exchange increased slightly to around 7,700 tons, while LME inventories rose to 2,385 tons [1] Group 2 - The article notes that the import losses for tin remain stable, and the processing fees for tin ore are also holding steady at 40% [1] - The overall industrial fundamentals are stable, with a tight supply situation expected to persist in September, although weak demand has not significantly impacted prices [1] - Tin prices are anticipated to continue fluctuating around 274,000 yuan per ton, with a projected trading range of 270,000 to 277,000 yuan per ton [1]