Bundled securities tracking Chinese markets were among the best performers to start the week. Overnight, China's CSI 300 Index jumped 2.3%, boosting several related exchange-traded funds. The iShares FTSE/Xinhua China 25 Index ( FXI) ETF climbed $4.23, or 3.2%, to $137.88. The SPDR S&P Emerging Asia Pacific ( GMF) was tacking on $1.88, or 2.5%, to $76.07. The SPDR S&P China ( GXC) was adding $1.65, or 2.3%, to $72.74. Also among winners, the United States Natural Gas ( UNG) ETF climbed 3.1% as natural gas futures rose by 25 cents to $6.45 per million British thermal units. The ETF was higher by $1.24 to $40.90. Basic materials-related bundled securities were also higher. Among individual stocks, Weyerhaeuser ( WY), Newmont Mining ( NEM) and Monsanto ( MON) gained 1.5% or more. The WisdomTree International Basic Materials ( DBN) ETF was up $1.01, or 2.9%, to $36.26. The PowerShares Dynamic Basic Materials ( PYZ) added 63 cents, or 2%, to $32.60. The Vanguard Materials ( VAW) ETF was gaining $1.46, or 1.8%, to $82.03. Meanwhile, ETFs tracking the oil and energy sector were among the worst decliners of Monday's mixed session. Recently, the front-month September crude contract shed 10 cents to $76.92 a barrel. The PowerShares Dynamic Oil & Gas Services ( PXJ) ETF was down 10 cents, or 0.4%, to $26.03. The SPDR S&P Oil & Gas Equipment & Services ( XES) shed 17 cents, or 0.5%, to $36.76. Several Internet-related bundled securities were under pressure. Amazon.com ( AMZN), Apple ( AAPL), Sun Microsystems ( SUNW) and Ariba ( ARBA) were all lower. The B2B Internet HOLDRs ( BHH) was down 2 cents, or 1.1%, to $1.83. The Internet Infrastructure HOLDRs ( IIH) ETF was off by 5 cents, or 1%, to $5. The First Trust Dow Jones Internet Index ( FDN) was losing 20 cents, or 0.8%, to $24.58. The Internet Architecture HOLDRs ( IAH) shed 29 cents, or 0.6%, to $50.03.