"American Express Dominates Stock Market with Mixed Q2 Earnings Results"

Scholastic's shares jumped 11.5% after announcing a $100 million increase in its share repurchase amount and posting positive quarterly results. American Express shares slipped 3.9% as the company fell short of revenue expectations but beat earnings per share estimates. Herc dropped 6.5% after being double-downgraded by Bank of America due to the ongoing writers and actors strike in Hollywood. AutoNation tumbled 12.3% despite exceeding expectations in its second-quarter results. Knight-Swift Transportation gained 0.8% despite weaker-than-expected earnings and revenue, while PPG Industries rose nearly 0.3% after posting strong second-quarter results.