Facebook shares will start trading later in one of the largest and most high-profile share flotations of recent years. Founder Mark Zuckerberg is set to remotely ring the opening bell that signals the start of daily dealing. Strong demand has led Facebook to increase both the price and the number of shares available for sale. The shares will go on sale at $38 each, valuing the eight-year-old social network site at $104bn (£66bn). The Nasdaq index, which is where technology giants such as Google and Apple are traded, opens at 0930 local time (1430 BST), with buying and selling of Facebook shares beginning about an ... (full story)