Just 10 S&P 500 stocks were trading higher on Monday, as benchmark indexes sold off in response to an oil price war between Russia and Saudi Arabia. The biggest gainer was Cabot Oil & Gas Corp. /zigman2/quotes/205804016/composite COG -1.19% after Cowen analysts said the " best-in-class gassy name" should be favored in the current selloff. The stock was up 11.4% in morning trade. Three car parts makers were higher, after Credit Suisse said that sector had the least exposure to supply chain disruption in China, given "slow turns, and adequate inventory position currently. Biggest risk seems to be late Spring shipments, and some seasonal categories within that," analysts wrote in a Monday note. "Bigger concerns would be demand recently, but stocks seem to be reflecting concerns, having lagged in recent months.' AutoZone Inc. /zigman2/quotes/209114484/composite AZO +0.02% stock was up 3%, O'Reilly Automotive Inc. /zigman2/quotes/207206119/composite ORLY -1.02% was up 2.6% and Advance Auto Parts Inc. /zigman2/quotes/202065737/composite AAP -2.12% was up 1.2%. The other gainers were Walmart Inc. /zigman2/quotes/207374728/composite WMT -1.59% , up 2%, Dollar Tree Inc. /zigman2/quotes/203712248/composite DLTR -1.48% , up 1.4%, Twitter Inc. /zigman2/quotes/203180645/composite TWTR -1.33% , up 1%, H&R Block Inc. /zigman2/quotes/207406664/composite HRB +2.36% , up 1%, Clorox Co. /zigman2/quotes/206443229/composite CLX +1.01% , up 0.9% and Dollar General Corp. /zigman2/quotes/200691429/composite DG -0.84% , up 0.7%.