Exchange-traded funds tracking homebuilders were the worst performers of a volatile week following a soft report on pending-home sales, disappointing earnings and more concerns over the extent of the subprime slump. The iShares Dow Jones U.S. Home Construction ( ITB) ETF gave back 7% to $14.23. The SPDR S&P Homebuilders ( XHB) ETF lost 2.1% to end the week at $16.63. On Tuesday, the National Association of Realtors reported on pending-homes sales for November, which showed a decline of 2.6%, more than three times the estimated drop. KB Home ( KBH) piled on the bad news after the homebuilder posted a fourth-quarter loss that ballooned from a year ago due to the housing slump, forcing the company to write down unsold inventory. Retailers were also mired in the red following Thursday's slew of retail same-store sales for December, which indicated a dismal performance during the holiday shopping season. Among bundled securities tracking retailers, the SPDR S&P Retail ( XRT) ETF was down 3.3% to $29.79. The PowerShares Dynamic Retail ( PMR) ETF fell 1.9% to $14.15. The Retail HOLDRs ( RTH) lost 0.9% to end the week at $86.50. Energy-related ETFs also fell for the week as crude finished with a 5.3% decline over the five sessions at $92.69. Among individual names, Exxon Mobil ( XOM), ConocoPhillips ( COP), Valero ( VLO), Halliburton ( HAL), and Transocean ( RIG) finished the week in the red. The PowerShares DB Oil ( DBO) lost 5.6% to $33.46. The United States Oil ( USO) declined 5.6% to $73. The iPath S&P GSCI Crude Oil Index ( OIL) shed 5.3% to $54.02. On the positive side, securities tracking gold futures were higher for the week. On Friday, gold prices briefly topped $900 an ounce for the first time. The Market Vectors Gold Miners ( GDX) ETF finished up 5.4% at $52.57. The iShares Comex Gold Trust ( IAU) ETF climbed 4% to $88.69. The streetTRACKS Gold Shares ( GLD) ETF rose 4% to $88.55.