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Bundled securities tracking the semiconductor sector were among Wednesday's best performers. Chipmaker

Advanced Micro Devices

(AMD) - Get Advanced Micro Devices, Inc. Report

climbed 5% after ThinkEquity upgraded shares to buy from sell, boosting the sector.

The

SPDR Semiconductor

(XSD) - Get SPDR S&P Semiconductor ETF Report

was higher by 2.3% to $49.67. The

Semiconductor HOLDRs

(SMH) - Get VanEck Vectors Semiconductor ETF Report

ETF was adding 1.8% to $34.80. The

iShares Goldman Sachs Semiconductor

(IGW)

ETF was gaining 1.6% to $62.65, and the

PowerShares Dynamic Semiconductors

(PSI) - Get Invesco Dynamic Semiconductors ETF Report

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ETF was tacking on 1% to $17.55.

The

Internet Infrastructure HOLDRs

( IIH) ETF trading higher as holding

Akamai Technologies

(AKAM) - Get Akamai Technologies, Inc. Report

was up by 3.1%. The ETF was rising 8 cents, or 1.5%, at $5.52.

The

PowerShares Lux Nanotech

(PXN)

ETF was another winner, thanks to a 13.1% rise in

Flamel Technologies

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. The ETF was higher by 17 cents, or 1%, to $17.28.

Among the losers, energy-related ETFs slumped in the face of a dramatic decline in crude prices. Oil futures were recently losing 87 cents to $57.65 a barrel, near the lowest level of 2006.

The

iShares Dow Jones U.S. Oil Equipment Index

(IEZ) - Get iShares U.S. Oil Equipment & Services ETF Report

ETF was falling by 2.5% to $39.86. The

Oil Services HOLDRs

(OIH) - Get VanEck Vectors Oil Services ETF Report

ETF was sinking 2.2% to $122.79, and the

SPDR Oil & Gas Equipment & Services

(XES) - Get SPDR S&P Oil & Gas Equipment & Services ETF Report

ETF was lower by 2.1% to $25.73.

The

iShares Dow Jones U.S. Broker-Dealers

(IAI) - Get iShares U.S. Broker-Dealers & Securities Exchanges ETF Report

ETF sank due to a decline of 17% in

Legg Mason

(LM) - Get Legg Mason, Inc. Report

after the company issued an earnings warning. The ETF was lower by $1.26, or 2.4%, to $50.55.