"American Express: Q2 Earnings Beat, Profit Rises, but Shares Fall"

American Express slides 3% after reporting smaller-than-expected revenue for Q2, while AutoNation beats expectations but sees a 3% drop in shares. Sunnova Energy sheds 2% after being downgraded by BMO, CSX falls 4% as it misses revenue expectations, and Capital One Financial rises slightly after posting better-than-expected earnings but missing revenue expectations. PPG Industries declines 2% despite strong Q2 results, and Intuitive Surgical falls 4% due to weaker-than-expected systems revenue. Knight-Swift Transportation drops over 2% after reporting lower-than-expected earnings and issuing weak guidance, while Scholastic rises 6% after beating earnings-per-share expectations and announcing an increase in share repurchase amount.