Friday's ETF Winners & Losers

Investors turned to precious metals amid another big selloff in the stock market Friday, boosting exchange-traded funds tracking gold and silver.

The September gold contract added $8.80 to $672.80, while silver gained 16 cents to $12.87.

The PowerShares DB Silver(DBS Quote) was adding 50 cents, or 2%, to $25.38. The PowerShares DB Precious Metals(DBP Quote) was gaining 46 cents, or 1.8%, to $26.21. The streetTracks Gold Shares(GLD Quote) was gaining $1.04, or 1.6%, to $66.50. The iShares Comex Gold Trust(IAU Quote) ascended $1.13, or 1.7%, to $66.64.

Real estate-related funds were among the hardest hit, as concerns about tightening credit and the burgeoning subprime mortgage crisis continued to escalate among investors. Major homebuilders including Lennar(LEN Quote), DR Horton(DHI Quote), Pulte Homes(PHM Quote) and Toll Brothers(TOL Quote) were all losing more than 2%.

The Ultra Real Estate ProShares(URE Quote) sank $2.47, or 5.4%, to $43.19. The iShares Dow Jones US Home Construction(ITB Quote) was losing $1.09, or 3.8%, to $27.63. The iShares FTSE NAREIT Mortgage REITs(REM Quote) was falling $1.05, or 3.2%, to $31.60.

ETFs tracking the European markets were also hit hard, as investors became increasingly concerned about the spread of U.S. credit worries across the Atlantic. A day after French bank BNP Paribas said it has suspended three of its funds with exposure to securities backed by U.S. subprime mortgages, Paris' CAC 40 sank 176.15 points and London's FTSE 100 closed down 232.90 points.

The PowerShares Dynamic Europe(PEH Quote) was sinking $1.06, or 4.4%, to $23.19. The iShares MSCI France Index(EWQ Quote) was losing $1.53, or 4.1%, to $35.39.

On the positive side, rising natural gas prices boosted some energy ETFs. The front-month natural gas futures contract was gaining 26 cents to $6.84.

The United States Natural Gas(UNG Quote) ETF was rising $1.58, or 3.8%, to $43.32. The PowerShares Dynamic Energy Exploration & Production(PXE Quote) was up 41 cents, or 2%, to $21.11. The PowerShares Dynamic Oil & Gas Services(PXJ Quote) was adding 28 cents, or 1.1%, to $24.89.

Rising semiconductor names boosted some bundled securities tacking technology. Atmel(ATML Quote) and On Semiconductor(ONNN Quote) were both adding more than 5%.

PowerShares Dynamic Technology(PTF Quote) was rising 57 cents, or 2.2%, to $26.39. The Internet Infrastructure HOLDRs(IIH Quote) was adding 7 cents, or 1.5%, to $4.70.