Patrick Frater Asia Bureau ChiefShares of China’s Bona Film Group soared by 44% on Thursday, their first day of trading following an initial public offering on the Shenzhen stock market.The company had offered its shares for sale at RMB5.03 apiece. They quickly climbed to RMB7.24, before hitting the market’s ceiling on daily price movements. At this price, the company is valued at RMB9.96 billion or $1.47 billion.