On the heels of the weekend's Live Earth concert series around the world, green investors on Monday were bidding up clean energy exchange-traded funds, making them the top performers of the session.

Among green concerns, First Solar ( FSLR) jumped nearly 18% on news it entered into five agreements worth $1.3 billion.

The First Trust Nasdaq Clean Edge U.S. Liquid ( QCLN) ETF was adding 66 cents, or 2.7%, to $25.25. The PowerShares WilderHill Clean Energy ( PBW) ETF was up 44 cents, or 2%, to $21.99. The Market Vectors Global Alternative Energy ( GEX) was higher by 92 cents, or 2%, to $46.22.

ETFs tracking silver and gold were also among the winners of the session. Silver futures gained 14 cents to $12.90 an ounce. Gold futures were adding $9.20 to $664 an ounce.

The Market Vectors Gold Miners ( GDX) rose 45 cents, or 1.1%, to $40.98. The PowerShares DB Gold ( DGL) gained 26 cents, or 1%, to $26.16. The PowerShares DB Precious Metals ( DBP) ETF was up 26 cents, or 1%, to $25.88. The PowerShares DB Silver ( DBS) was higher by 18 cents, or 0.7%, to $25.22.

Among losers, housing-related ETFs were declining on weak second-quarter home sales from Dominion Homes ( DHOM).

Among other housing concerns, Meritage Homes ( MTH) was lower by 1.6%, Centex ( CTX) slipped 1.5%, Beazer Homes ( BZH) was losing 1.5% and DR Horton ( DHI) was off 1.4%.

The iShares Dow Jones U.S. Home Construction ( ITB) was recently down 42 cents, or 1.3%, at $31.31. The SPDR Homebuilders ( XHB) ETF was shedding 35 cents, or 1.1%, to $30.55.

Retail-related ETFs were also suffering after Children's Place ( PLCE) sank 10% on weaker-than-expected comp sales in July.

Other retails trading lower included Kohl's ( KSS), Chico's FAS ( CHS), Aeropostale ( ARO) and Sears Holdings ( SHLD), all of which were falling 1.5% or more.

The SPDR S&P Retail ( XRT) ETF was down 49 cents, or 1.1%, to $43.90. The PowerShares Dynamic Retail ( PMR) was lower by 18 cents, or 0.9%, to $20. The Retail HOLDRs ( RTH) dipped by 38 cents, or 0.4%, to $106.97.

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