The home builder sector was knocked broadly lower morning trade Monday, after data showing that existing-home sales for March fell more than expected. The iShares U.S. Home Construction ETF /zigman2/quotes/203468436/composite ITB +3.64% dropped 1.1%, with 40 of 47 components trading lower, to pull back from Thursday's 8-month closing high. Among the most-active home builder shares, D.R. Horton Inc. /zigman2/quotes/202032328/composite DHI +2.66% slumped 1.9%, KB Home /zigman2/quotes/206220859/composite KBH +5.23% shed 1.5%, Lennar Corp. /zigman2/quotes/202536373/composite LEN +5.41% lost 1.3%, Toll Brothers Inc. /zigman2/quotes/201912487/composite TOL +9.21% fell 1.1% and TRI Pointe Group Inc. /zigman2/quotes/204302452/composite TPH +4.91% slid 1.9%. Earlier, the National Association of Realtors said Monday that March existing-home sales ran at a seasonally adjusted annual rate of 5.21 million, down 4.9% from February and below expectations of a 5.3 million rate. The home construction ETF has still climbed 26% year to date, while the S&P 500 /zigman2/quotes/210599714/realtime SPX +1.36% has gained 16%.