美股开盘，道指跌0.08%，标普500指数涨0.01%，纳指涨0.03%。柯尔百货盘初涨超85%，创纪录最大涨幅。“网红股”OpenDoor延续涨势，盘初涨超22%。洛克希德·马丁跌超8%，公司二季度净销售额不及预期。

Market Overview - The Dow Jones Industrial Average opened down 0.08% while the S&P 500 index rose 0.01% and the Nasdaq increased by 0.03% [1] Company Highlights - Kohl's Corporation saw a significant increase of over 85% at the opening, marking its largest record gain [1] - OpenDoor, referred to as a "meme stock," continued its upward trend with an initial rise of over 22% [1] - Lockheed Martin experienced a decline of over 8% due to second-quarter net sales falling short of expectations [1]