国泰君安国际（01788.HK）今日盘中股价大涨5.10%，引起市场广泛关注。截至发稿时，该股报价为5.770港元。
根据港交所数据，国泰君安国际于上午11:59出现大手买入，成交量为99.7万股，成交价为6.2港元，涉资约618.14万港元。这笔大额交易可能是推动股价上涨的主要因素。截至目前，该股今日最高价为6.24港元，最低价为5.71港元，总成交量达4.741亿股，总成交金额约28.231亿港元。
此外，南向资金的持续流入也可能对股价产生积极影响。数据显示，在7月15日，南向资金增持国泰君安国际2326.00万股。截至当日收盘，港股通共持有国泰君安国际142685.34万股，占流通股的14.99%。这表明投资者对该公司的前景保持乐观态度，可能进一步支撑了股价的上涨。
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