Six Flags Entertainment (NYSE:FUN – Get Free Report) was upgraded by analysts at Zacks Research from a “hold” rating to a “strong-buy” rating in a research note issued on Monday,Zacks.com reports. Northcoast Research initiated coverage on shares of Six Flags Entertainment in a research report on Wednesday, July 8th. Get Six Flags Entertainment alerts:Get Our Latest Analysis on Six Flags EntertainmentSix Flags Entertainment Stock Up 2.8%Shares of NYSE:FUN opened at $18.12 on Monday. About Six Flags Entertainment(Get Free Report)Six Flags Entertainment Corporation is a publicly traded regional theme park operator based in Arlington, Texas. Founded in 1961 by Angus G.Read MoreReceive News & Ratings for Six Flags Entertainment Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Six Flags Entertainment and related companies with MarketBeat.com's FREE daily email newsletter.