Indexes closed mostly lower Tuesday as leading stocks took a beating and the market's weakness intensified. The Dow rose 0.1%. But the Nasdaq, weighed by Baidu's (BIDU) dive and a slew of other tumbling Chinese growth stocks, fell 1.2%. The NYSE composite fell 0.4% and the S&P 500 lost 0.3%. Volume edged up across the board. It was the latest of many recent higher-volume declines in recent weeks for the market. Meanwhile, many leading stocks