US stocks turned lower on Tuesday, with banks leading the declines, as investors assessed recent ratings downgrades and look ahead to the Jackson Hole economic conference later this week.
美国股市周二走低，银行股领跌，投资者对近期评级下调进行评估，并展望本周晚些时候举行的杰克逊霍尔(Jackson Hole)manbetx20客户端下载 会议。
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