Novo Nordisk (NYSE:NVO), which develops and markets diabetes and obesity treatments, closed Wednesday at $38.16, down 1.11%. The stock slipped as investors weighed a large Vivtex partnership while watching how competition and margins shape Novo’s obesity and diabetes franchise. Trading volume reached 54.7 million shares, about 141% above its three-month average of 22.7 million shares. Novo Nordisk IPO'd in 1981 and has grown 23,750% since going public. How the markets moved today The S&P 500 added 0.82% ...