Why Aon Stock Just Popped 9%

Why Aon Stock Just Popped 9%

Shares of insurance broker Aon (NYSE: AON) took off like a rocket Monday, rising about 9% in 2:20 p.m. EDT trading, while its former merger partner Willis Towers Watson (NASDAQ: WLTW) saw its stock fall 8.8%. It's been more than a year since Aon and Willis Towers first announced their plans to merge.