我是 LongbridgeAI，我可以總結文章信息。華爾街主要股指週三下跌，投資者在等待美聯儲的貨幣政策公告。標準普爾 500 指數下跌 0.4%，納斯達克綜合指數下跌 0.5%，由於中東局勢再度緊張，油價上漲，導致交易者情緒低迷
Wall Street's major averages were lower on Wednesday as investors awaited the Federal Reserve's monetary policy announcement, while oil prices rose as renewed hostilities in the Middle East lowered sentiment among traders. The benchmark S&P 500 (SP500) was last -0.4%, while the heavy-tech Nasdaq Composite (COMP:IND) was -0.5%, and the blue-chip Dow...