Energy stocks took a broad dive Monday, as crude oil prices sold off amid concerns that the recent surge in new COVID-19 cases globally would sap demand. The SPDR Energy Select Sector ETF /zigman2/quotes/206420077/composite XLE +5.45% slumped 3.0%, and was the biggest decliner among SPDR ETFs tracking the S&P 500's /zigman2/quotes/210599714/realtime SPX +0.88% 11 key sectors, with all 25 equity components losing ground. Apache Corp.'s stock /zigman2/quotes/200648444/composite APA +10.48% was the ETF's (XLE) biggest decliner, as it dropped 6.3% toward a 6-month low. Among other more active XLE components, shares of Marathon Oil Corp. /zigman2/quotes/205031829/composite MRO +10.66% slid 5.3%, Occidental Petroleum Corp. /zigman2/quotes/207018272/composite OXY +13.42% shed 4.2%, Exxon Mobil Corp. /zigman2/quotes/204455864/composite XOM +3.66% slid 2.8%, Halliburton Co. /zigman2/quotes/210488727/composite HAL +7.82% declined 3.2% and Schlumberger NV /zigman2/quotes/201012972/composite SLB +6.25% gave up 3.2%. Meanwhile, crude oil futures /zigman2/quotes/209723049/delayed CL00 +0.99% fell 3.3% to a 3-week low.