开评：A股三大指数低开 脑机接口概念等板块涨幅居前
人民财讯5月19日电，A股三大指数集体低开，沪指跌0.21%，深证成指跌0.39%，创业板指跌0.53%。海运、保险、脑机接口概念等板块涨幅居前。半导体、存储器概念股、电信等板块跌幅居前。
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