UPDATE: Stifel Upgrades Infinera as 100G Demand Ramps Worldwide By: Benzinga via Benzinga March 20, 2014 at 09:59 AM EDT In a report published Thursday, Stifel analyst Sanjiv Wadhwani upgraded the rating on Infinera (NASDAQ: INFN) from Hold to Buy, and ... Read More >> Related Stocks: Infinera Corp