Shares of Mednax Inc. and Envision Healthcare Co. declined midday Wednesday after prominent short-seller Jim Chanos, the founder of Kynikos Associates, recommended betting against stocks of those companies. Shares of Envision, a health-care company and national hospital-based physician group, were most recently down 0.4%, while those for Mednax, which focuses on neonatal and pediatric health services, were off 1.3%. Chanos has previously stated his bets against Envision but reiterated the call at CNBC's Delivering Alpha conference. Читать дальше...