Oil prices plunged Monday morning over fears of an all-out price war. Roger Diwan, vice president for energy and financial markets at IHS Markit, joins “Squawk Box” to discuss. breaking newsbusiness newscablecable newsCNBCCONTINUEdeclineDiwanfinance newsfinance stockfinancial newsgasIHSMarkit39sMiningmoneymoney tipsnews channelnews stationoilpricesSquawk Box U.S.stock marketstock market newsstocksus newsVideosVlogworld newsYouTube