Shares of energy companies took a broad beating Monday, as crude oil futures sank toward seven-month lows amid demand concerns as China's economy slows. The SPDR Energy Select Sector ETF /zigman2/quotes/206420077/composite XLE -0.80% dropped 4.2% in morning trading, with all 21 equity components losing ground, after closing Friday at a two-month high. The component losses ranged from Kinder Morgan Inc.'s /zigman2/quotes/208455654/composite KMI -0.48% 2.6% decline to Halliburton Co.'s /zigman2/quotes/210488727/composite HAL -0.08% 5.6% fall. Elsewhere, shares of Chevron Corp. /zigman2/quotes/205871374/composite CVX -0.76% slid 3.6% to pace the Dow Jones Industrial Average's /zigman2/quotes/210598065/realtime DJIA -1.71% decliners. Among the other more-active components, shares of Exxon Mobil Corp. /zigman2/quotes/204455864/composite XOM -1.54% shed 4.2%, Occidental Petroleum Corp. /zigman2/quotes/207018272/composite OXY -1.06% slumped 4.5%, Devon Energy Corp. /zigman2/quotes/209479244/composite DVN -1.38% gave up 5.1% and Marathon Oil Corp. /zigman2/quotes/205031829/composite MRO -0.96% declined 5.4%. Meanwhile, continuous crude oil futures /zigman2/quotes/209723049/delayed CL00 -1.83% were down 5.3% toward the lowest settlement since Jan. 28, and the S&P 500 /zigman2/quotes/210599714/realtime SPX -1.51% lost 0.4%.