金融界5月12日消息，上证指数高开高走，中证现代农业主题指数 (CS现代农，930662)下跌0.4%，报 997.35点，成交额75.19亿元。 从中证现代农业主题指数持仓的市场板块来看，深圳证券交易所占比74.03%、上海证券交易所占比 25.97%。 从中证现代农业主题指数持仓样本的行业来看，畜牧产品占比39.61%、饲料占比37.86%、农产品占比 8.40%、种业占比7.29%、动物保健与育种占比5.99%、农业机械占比0.84%。 资料显示，指数样本每半年调整一次，样本调整实施时间分别为每年6月和12月的第二个星期五的下一 交易日。权重因子随样本定期调整而调整，调整时间与指数样本定期调整实施时间相同。在下一个定期 调整日前，权重因子一般固定不变。特殊情况下将对指数进行临时调整。当样本退市时，将其从指数样 本中剔除。样本公司发生收购、合并、分拆等情形的处理，参照计算与维护细则处理。 跟踪CS现代农的公募基金包括：易方达中证现代农业主题ETF。 数据统计显示，中证现代农业主题指数近一个月下跌5.59%，近三个月上涨5.31%，年至今上涨1.82%。 据了解，中证现代农业主题指数选取30只业务涉及农产品 ...

Group 1 - The Shanghai Modern Agriculture Theme Index closed at 1378.67 points, with a 2.37% increase over the past month, a 2.90% decrease over the past three months, and a 2.90% decline year-to-date [1] - The index comprises 30 listed companies involved in various sectors such as agricultural products, seed industry, feed, animal health and breeding, livestock products, fishery products, and agricultural machinery [1] - The top ten weighted companies in the index include Meihua Biological (15.84%), Beidahuang (8.53%), Hainan Rubber (7.42%), and others, with the Shanghai Stock Exchange accounting for 100% of the index holdings [1] Group 2 - The industry composition of the index shows that agricultural products account for 33.29%, feed for 28.95%, animal health and breeding for 15.05%, livestock products for 9.97%, seed industry for 6.06%, agricultural machinery for 3.50%, and fishery products for 3.19% [2] - The index samples are adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with special circumstances allowing for temporary adjustments [2]