Utilities were the only sector showing some green Monday, as its defensive nature and relatively high yield helped provide a boost as rising trade tensions sent Treasury yields tumbling. The SPDR Utilities Select Sector ETF /zigman2/quotes/206645117/composite XLU +0.78% was up 0.2% in midday trading, with 14 of 28 equity components trading higher. All the other SPDR ETFs tracking the S&P 500's /zigman2/quotes/210599714/realtime SPX +0.48% 11 sectors were down at least 1%. Among the utilities ETF's (XLU) more-active shares, Exelon Corp. /zigman2/quotes/205982254/composite EXC +0.13% rose 1.2%, Xcel Energy Inc. /zigman2/quotes/200626850/composite XEL +1.59% gained 1.9% and Duke Energy Corp. /zigman2/quotes/201480230/composite DUK -0.23% tacked on 0.2%. Meanwhile, the biggest decliner was NiSource Inc.'s stock /zigman2/quotes/208795963/composite NI -0.79% which shed 3.1%. Meanwhile, the Dow Jones Utilities Average /zigman2/quotes/210598062/realtime DJU +0.76% was down 0.3%, but was the only Dow average that had gainers, as 4 of the 15 components gained ground. Meanwhile, the Dow Jones Transportation Average /zigman2/quotes/210598063/realtime DJT -0.40% fell 3.0% with all 20 components losing ground and the Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA -0.07% tumbled 600 points with all 30 components in the red. The rising trade friction boosted safe-haven Treasury prices, which pushed the yield on the 10-year Treasury note down 8.7 basis points to 1.768%, toward the lowest close since October 2016. That makes utilities more attractive, as the XLU's dividend yield is 3.07%. The implied yield for the S&P 500 is 2.04%.