Group 1 - A-shares experienced significant market activity on October 17, with 44 stocks hitting the daily limit up and 28 stocks hitting the limit down [1] - The precious metals sector was notably active, with silver-related stocks achieving five limit ups in seven days [1] - Iron ore concept stocks showed strength, highlighted by Guangdong Mingzhu reaching the limit up [1] Group 2 - ST Ercai faced a continuous decline, recording six limit downs over seven days [2] - Songyang Resources and Tianpu Shares also experienced consecutive limit downs for two days [2] - Other companies such as ST Guohua and ST Yatai also hit the limit down [2]

连板股方面，大有能源、合肥城建6天5板，远大控股4连板，国新能源4天3板，上实发展、ST新华锦3 连板，东信和平4天2板，海通发展、纳尔股份等2连板，华天科技、深振业Ａ等涨停。 *ST元成连续5日跌停，松炀资源、天普股份连续2日跌停，*ST金比、*ST亚太等跌停。 10月17日午间，A股半日下来共有37只涨停股、13只跌停股。铁矿石概念活跃，广东明珠涨停。 ...

(行情来源：富途证券) 此外，全球宏观经济情绪走弱，也对铁矿石的需求产生相当大的压制。 格隆汇8月5日丨铁矿石概念股普跌，港股市场铁货(1029.HK)大跌13.66%，易大宗(1733.HK)跌近4%。A股市场铁矿石 概念股也普遍录得下跌。 上周钢材库存和铁矿港口库存数据齐齐上升，钢材需求疲软，且随着淡水河谷旗下最大铁矿复产，澳洲、巴西铁矿发 货量及到港量都有望岀现季节性增量，供需紧张状况逐渐缓解，四大矿山倾向在高价格水平的时候加速发货。尤其是 高品位矿石溢价压力较大。最新普氏铁矿石指数跌至108.45美元，创一个月半新低。 大商所铁矿石主力合约今天大跌近5%，跌破700元/吨，现报697元/吨，势将录得连续第四个交易日下跌。 ...

Group 1 - The A-share market saw significant gains with Linggang Co., Ltd. rising by 6.52% and Jinling Mining increasing by 5.62% [1] Group 2 - Dalian Commodity Exchange's iron ore futures for the near-month contract broke the historical threshold of 1000 yuan/ton, reaching a peak of 1000.5 yuan/ton [2] - The exchange implemented measures to cool down the iron ore futures market, limiting non-futures company members or clients to a maximum daily opening position of 5000 lots for the I2105 contract starting December 14 [2] - This marks the fourth intervention by the exchange in the past seven days, reflecting the regulatory body's commitment to the stable development of the commodity [2] - According to Yong'an Futures' research report, the recent alleviation of supply pressures and stable demand, coupled with steel mills' need to replenish stocks at year-end, have contributed to the upward price movement of iron ore [2]