长飞光纤光缆（06869）今日盘中大跌5.17%，延续近期跌势。该股自9月高点以来已累计下跌超过40%，引发市场广泛关注。
造成股价下跌的主要原因有以下几点：首先，野村证券最近发布研报，将长飞光纤的评级从"买入"下调至"中性"。研报指出，中国移动近期公布的光纤招标结果显示，长飞光纤的市场份额及平均售价均有所下跌，这可能自今年第三季度起对公司盈利构成压力。
其次，公司大股东Draka Comteq B.V.近期大幅减持股份，引发市场忧虑。数据显示，Draka Comteq B.V.于9月19日通过大宗交易出售了3759.53万股H股，占总股本5%。这次减持后，Draka Comteq B.V.不再持有长飞光纤的H股。值得注意的是，自4月17日至9月19日期间，Draka Comteq B.V.累计减持长飞光纤H股近1.8亿股，占公司总股本的23.73%。大股东的密集减持行为加剧了市场对公司前景的担忧，进一步压制了股价。
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