The energy sector is the strongest of the S&P 500's /zigman2/quotes/210599714/realtime SPX -1.05% 11 key sectors Monday, as progress toward a U.S.-China trade deal has provided a lift to crude oil and natural gas futures and the stocks of companies in the oil and gas business. The SPDR Energy Select Sector ETF /zigman2/quotes/206420077/composite XLE -1.19% rose 1.5% with all 28 equity components gaining ground. Among the ETF's (XLF) more active components, shares of Halliburton Co. /zigman2/quotes/210488727/composite HAL -3.14% rallied 2.5%, Schlumberger Ltd. /zigman2/quotes/201012972/composite SLB -1.30% hiked up 1.6%, Exxon Mobil Corp. /zigman2/quotes/204455864/composite XOM -1.22% gained 1.0%, Occidental Petroleum Corp. /zigman2/quotes/207018272/composite OXY -1.98% tacked on 1.8% and Kinder Morgan Inc. /zigman2/quotes/208455654/composite KMI -0.45% advanced 1.5%. Chesapeake Energy Corp.'s stock /zigman2/quotes/201364537/composite CHK -6.39% , which is not an XLF component, rose 0.8%. Continuous crude oil futures gained 0.3% toward a 3-month high and natural gas futures /zigman2/quotes/210189548/delayed NG00 +0.05% surged 2.6%.