 |  | Tesla climbs as Musk prepares to hand over first Model 3 cars |  | SAN FRANCISCO (Reuters) - Shares of Tesla Inc rose nearly 1 percent on Friday ahead of a handover to customers of its first Model 3 sedans, the electric cars that Chief Executive Officer Elon Musk is betting will propel his company into the mass market. | |  |  |  | Google, Facebook show power of ad duopoly as rivals stumble |  | SAN FRANCISCO (Reuters) - Quarterly results from Alphabet Inc and Facebook Inc provided fresh evidence this week that the digital advertising market is effectively a duopoly, a dynamic with deep implications for two of Silicon Valley's titans. | |  | |  |  | |  |  | Related Video | |  | |  | |  |  |  |  |  | Counterparties is a curated snapshot of the best finance news and commentary around the web. Register Today |  | |  |  |  | News you can use with actionable, timely advice for managing your financial life, including retirement, taxes, real estate, education and more. Register Today |  | |  | » » MORE NEWSLETTERS |  | |