Shares of the Internet HOLDRs ( HHH) exchange-traded fund were dragged down more than 3% after Amazon.com ( AMZN) posted disappointing second-quarter earnings and slashed its full-year operating income forecast. Shares of the online retailer were recently trading down $7.25, or 22%, to $26.34. The Internet ETF was lower by $1.59 to $45.04. The Amazon disappointment also weighed on the Retail HOLDRs ( RTH), which recently was down $1.92, or 2%, to $90.01. The Internet Infrastructure HOLDRs ( IIH) ETF, meanwhile, was down about 2%. Akamai Technologies ( AKAM), one of the fund's largest holdings, was trading down $1.42, or 4%, to $30.56 ahead of its second-quarter earnings release. After the bell, the company is expected to report earnings of 18 cents a share on revenue of $94.7 million. Shares of the Internet Infrastructure ETF were trading down 7 cents to $4.21. Most of the stocks included in the Semiconductor HOLDRs ( SMH) ETF were moving higher Wednesday. Despite posting weaker-than-expected first-quarter sales, Xilinx ( XLNX) was climbing $1, or 5%, to $20.60. The company also guided second-quarter sales below expectations, but investors continued to bid the stock higher. Texas Instruments ( TXN), which accounts for the biggest weighting in the fund, was up 64 cents, or 2%, to $29.59. ETFs related to oil services tacked on big gains for a second straight day. Shares of the Oil Services HOLDRs ( OIH) ETF were up $3.99, or 3%, $143.45. The PowerShares Dynamic Oil & Gas Services ( PXJ) ETF was trading up 46 cents, or 2%, to $20.10, while the iShares Dow Jones U.S. Oil & Gas Exploration Index ( IEO) fund rose $1.45, or 3%, to $50.86.