Uber's market debut sours most anticipated IPO since Facebook

By Joshua Franklin, Aparajita Saxena and Heather Somerville (Reuters) - Uber Technologies Inc's conservative initial public offering could not keep its shares from sinking in their trading debut on Friday, fueling debate on Wall Street over whether the outcome of the most anticipated listing since Facebook Inc would weigh on other Silicon Valley unicorns. Uber considered going public for at least four years. Yet the ride-hailing company picked a week for its IPO plagued by market turbulence fuel