Factbox - Analysts' reactions on OPEC decision

(Reuters) - Oil analysts are taking stock of Thursday's OPEC meeting which decided against production cuts despite a huge oversupply in world markets. Brent crude oil plunged as much as $6.50 a barrel on Thursday, and U.S. crude fell by nearly as much, posting the steepest one-day falls since 2011. BNP Paribas Date: Nov. 28 Call: OPEC's decision to maintain its production entrenches a surplus in.