Bundled securities tracking the semiconductor sector were among the best performers Monday following a 2.3% advance in the Philadelphia Semiconductor Sector Index.

The

iShares Goldman Sachs Semiconductor

(IGW)

ETF was recently up 2.3% to $55.50, the

Semiconductor HOLDRs

(SMH) - Get Report

ETF was adding 2.2% to $31.28, the

SPDR Semiconductor

(XSD) - Get Report

was gaining 2.2% to $43.43 and the

PowerShares Dynamic Semiconductors

(PSI) - Get Report

ETF was higher by 2% to $15.64.

Declining crude prices crushed energy-related ETFs, following

BP's

(BP) - Get Report

disclosure late Friday that it would continue oil production from the western side of Alaska's Prudhoe Bay field.

The

PowerShares Dynamic Oil & Gas Services

(PXJ) - Get Report

was lower by 2.4% to $19.32, the

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

(IEO) - Get Report

was falling 2.3% to $49.37 and the

Oil Services HOLDRs

(OIH) - Get Report

ETF was off 1.8% to $135.22.

Meanwhile, ETFs tracking transportation were higher thanks to oil's decline. The

iShares Dow Jones Transportation Average

(IYT) - Get Report

was adding nearly 1% to $74.90.

ETFs related to gold were also among the day's decliners, as a halt to the fighting between Israeli forces and Hezbollah militants took effect, bringing a cessation to a month of combat. The

streetTRACKS Gold Shares

(GLD) - Get Report

ETF was recently down 38 cents, or 0.6%, to $62.33, and the

iShares Comex Gold

(IAU) - Get Report

ETF was lower by 39 cents, or 0.6%, to $62.41.

ETFs tracking health care services were edging higher after

HealthSouth

(HLSH)

said it's exploring options that could include the spinoff or sale of its surgery center and outpatient rehabilitation divisions, sending the stock 10% higher.

The

Health Care Select Sector SPDR

(XLV) - Get Report

was gaining 17 cents, or 0.5%, to $31.73, and the

Vanguard Health Care VIPERs

(VHT) - Get Report

ETF was tacking on 30 cents, or 0.6%, to $54.11.