Exchange-traded funds following gold were among the worst performers of Monday's session as futures dropped in price. Recently, gold prices were dropping $19.70 to $734.40 an ounce. The Market Vectors Gold Miners ( GDX) ETF was lower by $1.13 or 2.5%, to $44.46. The PowerShares DB Base Metals ( DBB) was down 68 cents, or 2.6%, to $25.72. The iShares Comex Gold Trust ( IAU) was declining 88 cents, or 1.2%, to $72.66. The PowerShares DB Precious Metals ( DBP) eased 34 cents, or 1.2%, to $28.10. ETFs tracking homebuilders were also among the worst losers of a mixed session Monday. Recently, Hovnanian ( HOV), Standard Pacific ( SPF), D.R. Horton ( DHI), Lennar ( LEN) and Centex ( CTX) were all losing 2% or more. The iShares Dow Jones U.S. Home Construction ( ITB) was down 68 cents, or 3%, to $22.10. The SPDR S&P Homebuilders ( XHB) fell 38 cents, or 1.6%, to $22.99. Oil-related ETFs were also on the decline, as crude sank $1.47 to $79.75 a barrel. Over the last seven sessions, the November contract has lost 3.8%. The United States Oil ( USO) ETF was losing $1.28, or 2.1%, to $61. The iPath S&P GSCI Crude Oil Index ( OIL) slid 95 cents, or 2.1%, to $45.01. The PowerShares DB Oil ( DBO) was down 37 cents, or 1.3%, to $29.10. Real estate ETFs were also under pressure. Deutsche Securities downgraded Kimco Realty ( KIM), Avalon Bay ( AVB), Boston Properties ( BXP) and Public Storage ( PSA) to hold from buy. The Ultra Real Estate ProShares ( URE) was losing $1.45, or 2.7%, to $52.02. The Vanguard REIT Index ( VNQ) ETF was lower by $1.16, or 1.5%, to $75.53. The iShares Dow Jones U.S. Real Estate ( IYR) eased 77 cents, or 1%, to $80.03. On the other hand, the Internet Architecture HOLDRs ( IAH) was one of few winners, buoyed by Google ( GOOG), which topped the $600 level for the first time Monday. Among its holdings, Hewlett-Packard ( HPQ) and Symantec ( SYMC) were up by 2.1% and 2.7%, respectively. The Internet Architecture HOLDRs was recently up 46 cents, or 0.9%, to $54.30.