The worst performers Monday in the exchange-traded funds universe are those related to precious metals, as gold and silver futures fell hard. The

iShares Silver Trust

(SLV) - Get Report

ETF was sinking $10.26, or 8.5%, to $111.04. The

iShares Comex Gold

(IAU) - Get Report

ETF was losing $1.98, or 3.3%, to $58.70. The

streetTRACKS Gold Shares

(GLD) - Get Report

ETF was down $1.98, or 3.3%, to $58.66.

ETFs tracking to oil services were also weaker, as oil prices briefly sank below the $65-a-barrel level. Crude was set to close lower for the sixth-straight session following OPEC's decision to keep production quotas unchanged.

The

Oil Service HOLDRs

(OIH) - Get Report

ETF was losing 2.3% to $128.39. The

PowerShares Dynamic Oil & Gas Services

(PXJ) - Get Report

ETF was sliding by 1.8% to $18.75. The

iShares Dow Jones U.S. Oil & Gas Exploration Index

(IEO) - Get Report

ETF was falling by 1.6% to $45.95.

Meanwhile, ETFs related to semiconductors were also among the winners Monday.

Freescale Semiconductor

(FSL)

jumped by more than 20% after

The New York Times

reported it will be sold to a group of investors for more than $16 billion. Additionally,

Texas Instruments

(TXN) - Get Report

was rising 3% ahead of its midquarter update, due after the close.

The

SPDR Semiconductor

(XSD) - Get Report

ETF was tacking on $1.17, or 2.5%, to $48.06. The

PowerShares Dynamic Semiconductors

(PSI) - Get Report

ETF was gaining 44 cents, or 2.7%, to $16.82. The

iShares Goldman Sachs Semiconductor

(IGW)

ETF was adding $1.36, or 2.3%, to $60.41. The

Semiconductor HOLDRs

(SMH) - Get Report

ETF was higher by 50 cents, or 1.5%, to $33.80

Also among winners, a gain of 4.7% in

Best Buy

(BBY) - Get Report

helped push the

PowerShares Dynamic Retail

(PMR) - Get Report

ETF higher, recently by 20 cents, or 1.2%, to $17.09. The

Retail HOLDRs

(RTH) - Get Report

was rising by $1.44, or 1.5%, to $95.73. Best Buy is set to report fiscal second-quarter earnings Tuesday morning.